2023年全國碩士研究生考試考研英語一試題真題(含答案詳解+作文范文)_第1頁
已閱讀1頁,還剩134頁未讀, 繼續(xù)免費閱讀

下載本文檔

版權說明:本文檔由用戶提供并上傳,收益歸屬內(nèi)容提供方,若內(nèi)容存在侵權,請進行舉報或認領

文檔簡介

1、<p>  3GPP TR 25.942 V8.0.0 (2008-12)</p><p>  Technical Report</p><p>  3rd Generation Partnership Project;</p><p>  Technical Specification Group Radio Access Networks;</p

2、><p>  Radio Frequency (RF) system scenarios</p><p>  (Release 8)</p><p>  The present document has been developed within the 3rd Generation Partnership Project (3GPP TM) and may be fu

3、rther elaborated for the purposes of 3GPP. The present document has not been subject to any approval process by the 3GPP Organizational Partners and shall not be implemented. This Specification is provided for future

4、 development work within 3GPP only. The Organizational Partners accept no liability for any use of this Specification.Specifications and reports for implementation of the</p><p><b>  Keywords</b>

5、;</p><p>  UMTS, radio</p><p><b>  3GPP</b></p><p>  Postal address</p><p>  3GPP support office address</p><p>  650 Route des Lucioles - Soph

6、ia Antipolis</p><p>  Valbonne - FRANCE</p><p>  Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16</p><p><b>  Internet</b></p><p>  http://www.3gpp.org</p&

7、gt;<p>  Copyright Notification</p><p>  No part may be reproduced except as authorized by written permission.The copyright and the foregoing restriction extend to reproduction in all media.</p>

8、;<p>  © 2008, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC).</p><p>  All rights reserved.</p><p>  UMTS? is a Trade Mark of ETSI registered for the benefit of its

9、 members</p><p>  3GPP? is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational PartnersLTE? is a Trade Mark of ETSI currently being registered for the benefit of it

10、s Members and of the 3GPP Organizational Partners</p><p>  GSM® and the GSM logo are registered and owned by the GSM Association</p><p><b>  Contents</b></p><p>  F

11、oreword8</p><p><b>  1Scope9</b></p><p>  2References9</p><p>  3Definitions, symbols and abbreviations11</p><p>  3.1Definitions11</p><

12、p>  3.2Symbols11</p><p>  3.3Abbreviations11</p><p>  4General11</p><p>  4.1Single MS and BTS12</p><p>  4.1.1Constraints12</p><p>  4.1.1.1

13、Frequency Bands and Channel Arrangement12</p><p>  4.1.1.2Proximity12</p><p>  4.2Mobile Station to Mobile Station13</p><p>  4.2.1Near-far effect13</p><p>  4.2

14、.2Co-located MS and intermodulation14</p><p>  4.2.3Estimated UE Out of Band Blocking15</p><p>  4.3Mobile Station to Base Station16</p><p>  4.4Base Station to Mobile Statio

15、n18</p><p>  4.4.1Near-far effect18</p><p>  4.4.2Co-located Base Stations and intermodulation20</p><p>  4.5Base Station to Base Station20</p><p>  5Methodolog

16、y for coexistence studies FDD/FDD22</p><p>  5.1ACIR22</p><p>  5.1.1Definitions22</p><p>  5.1.1.1Outage22</p><p>  5.1.1.2Satisfied user22</p><p&g

17、t;  5.1.1.3ACIR22</p><p>  5.1.2Introduction22</p><p>  5.1.2.1Overview of the simulation principles22</p><p>  5.1.3Simulated scenarios in the FDD - FDD coexistence scenario

18、23</p><p>  5.1.3.1Macro to macro multi-operator case23</p><p>  5.1.3.1.1Single operator layout23</p><p>  5.1.3.1.2Multi-operator layout23</p><p>  5.1.3.2Mac

19、ro to micro multi-operator case23</p><p>  5.1.3.2.1Single operator layout, microcell layer23</p><p>  5.1.3.2.2Multi-operator layout24</p><p>  5.1.3.3Services simulated25&l

20、t;/p><p>  5.1.4Description of the propagation models25</p><p>  5.1.4.1Received signal25</p><p>  5.1.4.2Macro cell propagation model26</p><p>  5.1.4.3Micro cell

21、propagation model26</p><p>  5.1.5Simulation description27</p><p>  5.1.5.1Single step (snapshot) description28</p><p>  5.1.5.2Multiple steps (snapshots) execution28</p&g

22、t;<p>  5.1.6Handover and Power Control modelling28</p><p>  5.1.6.1Handover Modelling28</p><p>  5.1.6.1.1Uplink Combining28</p><p>  5.1.6.1.2Downlink Combining29&l

23、t;/p><p>  5.1.6.2Power Control modelling of traffic channels in Uplink29</p><p>  5.1.6.2.1Simulation parameters29</p><p>  5.1.6.2.2SIR calculation in Uplink29</p><p

24、>  5.1.6.2.3Admission Control Modelling in Uplink29</p><p>  5.1.6.3Power Control modelling of traffic channels in Downlink29</p><p>  5.1.6.3.1Simulation parameters30</p><p&

25、gt;  5.1.6.3.2SIR calculation in Downlink30</p><p>  5.1.6.3.3Admission Control Modelling in Downlink30</p><p>  5.1.6.3.4Handling of Downlink maximum TX power31</p><p>  5.1.

26、7System Loading and simulation output31</p><p>  5.1.7.1Uplink31</p><p>  5.1.7.1.1Single operator loading31</p><p>  5.1.7.1.2multi-operator case (macro to macro)31</p&g

27、t;<p>  5.1.7.1.3multi-operator case (macro to micro)32</p><p>  5.1.7.2Downlink32</p><p>  5.1.7.2.1Single operator loading32</p><p>  5.1.7.2.2multi-operator case (m

28、acro to macro)32</p><p>  5.1.7.2.3Multi-operator case (Macro to Micro)32</p><p>  5.1.7.3Simulation output33</p><p>  5.1.8Annex: Summary of simulation parameters34</p>

29、;<p>  5.1.9Simulation Parameters for 24 dBm terminals35</p><p>  5.1.9.1Uplink35</p><p>  5.2BTS Receiver Blocking36</p><p>  5.2.1Assumptions for simulation scenario

30、 for 1 Km cell radius36</p><p>  5.2.2Assumptions for simulation scenario for 5 Km cell radius37</p><p>  5.2.3Assumptions for macro-micro simulation scenario with 1 and 2 Km interfering mac

31、ro cell radius37</p><p>  5.2.4Assumptions for micro-micro simulation scenario38</p><p>  6Methodology for coexistence studies FDD/TDD39</p><p>  6.1Evaluation of FDD/TDD inte

32、rference39</p><p>  6.1.1Simulation description39</p><p>  6.1.1.1Simulated services39</p><p>  6.1.1.2Spectrum mask40</p><p>  6.1.1.3Maximum transmit power40

33、</p><p>  6.1.1.4Receiver filter40</p><p>  6.1.1.5Power control41</p><p>  6.1.2Macro Cell scenario43</p><p>  6.1.2.1Evaluation method43</p><p> 

34、 6.1.2.2Pathloss formula43</p><p>  6.1.2.3User density43</p><p>  6.1.3Micro cell scenario44</p><p>  6.1.3.1Evaluation method44</p><p>  6.1.3.2Pathloss form

35、ula44</p><p>  6.1.3.3User density44</p><p>  6.1.4Pico cell scenario44</p><p>  6.1.4.1Evaluation method44</p><p>  6.1.4.2Pathloss formula44</p><p

36、>  6.1.4.3User density44</p><p>  6.1.5HCS scenario45</p><p>  6.2Evaluation of FDD/TDD interference yielding relative capacity loss45</p><p>  6.2.1Definition of system c

37、apacity45</p><p>  6.2.2Calculation of capacity45</p><p>  6.2.2.1Calculation of single operator capacity46</p><p>  6.2.2.2Calculation of multi operator capacity46</p>

38、<p>  7Methodology for coexistence studies TDD/TDD47</p><p>  7.1Introduction47</p><p>  7.2Evaluation of the TDD/TDD interference47</p><p>  7.3Evaluation of TDD/TDD

39、interference yielding relative capacity loss47</p><p>  7.4ACIR48</p><p>  7.4.1Macro to Macro multi-operator case48</p><p>  7.4.1.1Synchronised operators48</p><p

40、>  7.4.1.2Non synchronised operators48</p><p>  7.4.1.2.1Description of the Propagation Models49</p><p>  7.4.1.2.1.1Minimum Coupling Loss (MCL)49</p><p>  7.4.1.2.1.2BS-t

41、o-MS and MS-to-BS propagation model49</p><p>  7.4.1.2.1.3BS-to-BS propagation model49</p><p>  7.4.1.2.1.4MS-to-MS propagation model49</p><p>  7.4.2Simulation parameters50&

42、lt;/p><p>  7AMethodology for coexistence studies of UTRA FDD with other radio technologies51</p><p>  7A.1Introduction51</p><p>  7A.2Simulation layout52</p><p>  7

43、A.3Definition of the propagation models and related parameters52</p><p>  7A.4Parameters for UTRA FDD frequency variants53</p><p>  7A.5Parameters for other studied radio technologies53<

44、;/p><p>  8Results, implementation issues, and recommendations55</p><p>  8.1FDD/FDD55</p><p>  8.1.1ACIR for 21 dBm terminals55</p><p>  8.1.1.1UL Speech (8 kbps):

45、 ACIR Intermediate macro to macro case55</p><p>  8.1.1.2UL Speech (8 kbps): ACIR worst macro to macro case56</p><p>  8.1.1.3DL Speech (8 kbps): ACIR intermediate macro to macro case56<

46、/p><p>  8.1.1.4DL Speech (8 Kbps): ACIR worst macro to macro case57</p><p>  8.1.2ACIR for 24 dBm terminals58</p><p>  8.1.2.1UL Speech (8 kbps): macro to macro58</p><

47、;p>  8.1.2.2UL Data (144 kbps): macro to macro59</p><p>  8.1.3BTS Receiver Blocking59</p><p>  8.1.3.1Simulation Results for 1 Km cell radius59</p><p>  8.1.3.2Simulation

48、 Results for 5 Km cell radius61</p><p>  8.1.3.3Simulation Results for macro-micro simulation scenario with 1 and 2 Km interfering macro cell radius64</p><p>  8.1.4Transmit intermodulation

49、for the UE64</p><p>  8.1.5Rational on test parameters for UE adjacent channel selectivity65</p><p>  8.1.5.1Macro / Micro Scenario65</p><p>  8.1.5.2OnOff Characteristic66&l

50、t;/p><p>  8.1.5.2.1Macro-Micro (38dBm) with UE ACS OnOff Characteristic67</p><p>  8.1.5.2.2Macro- Single Micro (38dBm) with UE ACS OnOff Characteristic67</p><p>  8.1.5.3UE ACS

51、Mask Characteristic68</p><p>  8.1.5.3.1Macro-Micro with UE ACS Mask Characteristic69</p><p>  8.2FDD/TDD69</p><p>  8.2.1Evaluation of the FDD/TDD interference69</p>

52、<p>  8.2.1.1Simulation results69</p><p>  8.2.1.2Summary and Conclusions73</p><p>  8.2.2Evaluation of FDD/TDD interference yielding relative capacity loss73</p><p>  8.

53、2.2.1Simulation results73</p><p>  8.3TDD/TDD73</p><p>  8.3.1Evaluation of the TDD/TDD interference73</p><p>  8.3.1.1Simulation results73</p><p>  8.3.1.2Sum

54、mary and Conclusions76</p><p>  8.3.2Evaluation of FDD/TDD interference yielding relative capacity loss76</p><p>  8.3.2.1Simulation results76</p><p>  8.3.3ACIR76</p>

55、<p>  8.3.3.1Synchronised operators76</p><p>  8.3.3.1.1Speech (8 kbps): UL and DL macro to macro case76</p><p>  8.3.3.1.2Comparison with the FDD/FDD coexistence analysis results78&

56、lt;/p><p>  8.3.3.2Non synchronised operators79</p><p>  8.4Site engineering solutions for co-location of UTRA-FDD with UTRA-TDD80</p><p>  8.4.1General80</p><p>  8

57、.4.2Interference Mechanism80</p><p>  8.4.2.1Unwanted UTRA-TDD emissions80</p><p>  8.4.2.2Blocking of UTRA-FDD BS receiver80</p><p>  8.4.3Site engineering solutions81</

58、p><p>  8.4.3.1Antenna installation81</p><p>  8.4.3.2RF filters81</p><p>  8.4.3.2.1UTRA-TDD base station transmitter filter81</p><p>  8.4.3.2.2UTRA-FDD base stat

59、ion receiver filter81</p><p>  8.4.4Scenario Examples82</p><p>  8.4.4.1General82</p><p>  8.4.4.2Scenario 1: Both TDD and FDD adjacent to 1920 MHz82</p><p>  8.

60、4.4.3Scenario 2a: TDD 1900-1915 MHz and FDD 1920-1940 MHz82</p><p>  8.4.4.4Scenario 2b: TDD 1900-1920 MHz and FDD 1930-1980 MHz83</p><p>  9Additional Coexistence studies84</p><

61、;p>  9.1Simulation results on TDD local area BS and FDD wide area BS coexistence84</p><p>  9.1.1Introduction84</p><p>  9.1.2Simulator Description85</p><p>  9.1.2.1Simul

62、ation procedure overview85</p><p>  9.1.2.2System Scenario85</p><p>  9.1.2.3Propagation Model86</p><p>  9.1.2.3.1TDD BS to TDD UE86</p><p>  9.1.2.3.2FDD UE t

63、o FDD BS86</p><p>  9.1.2.3.3TDD UE to FDD BS86</p><p>  9.1.2.3.4FDD UE to TDD UE86</p><p>  9.1.2.3.5FDD UE to TDD BS86</p><p>  9.1.2.3.6TDD BS to FDD BS86&

64、lt;/p><p>  9.1.2.4Power Control87</p><p>  9.1.2.5Interference Modelling Methodology87</p><p>  9.1.3Capacity Calculations87</p><p>  9.1.3.1Calculation of Single

65、Operator Capacity for TDD and FDD87</p><p>  9.1.3.2Calculation of Multi Operator Capacity88</p><p>  9.1.3.3Calculation of relative capacity loss88</p><p>  9.1.4Simulation P

66、arameters89</p><p>  9.1.5Simulation results89</p><p>  9.1.6Conclusions90</p><p>  10Antenna-to-Antenna Isolation90</p><p>  10.1Rationale for MCL value for co

67、-located base stations90</p><p>  10.2Rationale for MCL value for operation of base stations in the same geographic area91</p><p>  10.2.1Wide Area and Geneal Purpose Base Station91</p&g

68、t;<p>  10.2.2Local Area Base Station91</p><p>  10.3Rationale for MCL values for co-sited base stations of different classes92</p><p>  11Modulation accuracy93</p><p>

69、  11.1Downlink modulation accuracy93</p><p>  11.1.1Simulation Condition and Definition93</p><p>  11.1.2Simulation Results93</p><p>  11.1.3Considerations94</p><

70、p>  11.1.4Conclusion94</p><p>  11.2Uplink Modulation Accuracy95</p><p>  11.2.1Value for Modulation Accuracy95</p><p>  11.2.2References for minimum requirements95</p

71、><p>  12UE active set size95</p><p>  12.1Introduction95</p><p>  12.2Simulation assumptions96</p><p>  12.3Simulation results96</p><p>  12.3.1Case

72、 1: Three sectored, 65° antenna97</p><p>  12.3.2Case 2: Three sectored, 90° antenna98</p><p>  12.3.3Case 3: Three sectored, 65° antenna, bad planning99</p><p>

73、  12.3.4Cases 4: Standard omni scenario100</p><p>  12.3.4.1Case 4a: WINDOW_ADD = 5 dB100</p><p>  12.3.4.2Case 4b: WINDOW_ADD = 3 dB101</p><p>  12.3.4.3Case 4c: WINDOW_ADD

74、= 7 dB101</p><p>  12.3.5Case 5: Realistic map102</p><p>  12.4Conclusions103</p><p>  13Informative and general purpose material103</p><p>  13.1CDMA definitio

75、ns and equations103</p><p>  13.1.1CDMA-related definitions104</p><p>  13.1.2CDMA equations105</p><p>  13.1.2.1BS Transmission Power105</p><p>  13.1.2.2Rx Si

76、gnal Strength for UE Not in Handoff (Static propagation conditions)105</p><p>  13.1.2.3Rx Strength for UE Not in Handoff (Static propagation conditions)106</p><p>  13.1.2.4Rx Signal Streng

77、th for UE in two-way Handover107</p><p>  13.2Amplitude statistics for TM1, TM5 and TM6107</p><p>  14Rationales for unwanted emission specifications109</p><p>  14.1Out of ba

78、nd Emissions109</p><p>  14.1.1Adjacent Channel Leakage Ratio109</p><p>  14.1.2Spectrum mask109</p><p>  14.1.2.1Spectrum mask for 43 dBm base station output power per carrie

79、r109</p><p>  14.1.2.2Spectrum masks for other base station output powers110</p><p>  14.1.2.2.1Output power > 43 dBm110</p><p>  14.1.2.2.239 dBm Output power 43 dBm110

80、</p><p>  14.1.2.2.331 dBm Output power < 39 dBm111</p><p>  14.1.2.2.4Output Power < 31 dBm111</p><p>  14.1.2.2.5Frequency range111</p><p>  14.2Spuriou

81、s Emissions112</p><p>  14.2.1Mandatory requirements112</p><p>  14.2.2Regional requirements112</p><p>  14.2.2.1Co-existence with adjacent services112</p><p>  

82、14.2.2.2Co-existence with other systems112</p><p>  14.2.3Background of Spurious emission limits (Category B)112</p><p>  14.2.3.1Old Category B spurious emission limits (until 2006-12)113

83、</p><p>  14.2.3.2Implications for Evolved UTRA (Long Term Evolution in 3GPP)115</p><p>  14.2.3.3New Category B spurious emission limits (after 2006-12)115</p><p>  14.2.3.4Co

84、-existence studies performed for UTRA117</p><p>  15Link Level performances118</p><p>  15.1Propagation Models118</p><p>  15.1.1Rationale for the choice of multipath fading C

85、ase 2118</p><p>  15.2Simulation results for UE TDD performance test119</p><p>  15.2.1Downlink Simulation assumptions119</p><p>  15.2.1.1General119</p><p>  15

86、.2.1.2Additional downlink parameters119</p><p>  15.2.2Downlink Simulation results and discussion120</p><p>  15.2.3Uplink Simulation assumptions122</p><p>  15.2.3.1General

87、122</p><p>  15.2.3.2Additional uplink parameters122</p><p>  15.2.4Uplink Simulation results and discussion122</p><p>  15.3Simulation results for UE FDD performance test123&

88、lt;/p><p>  15.3.1BTFD performance simulation123</p><p>  15.3.1.1Introduction123</p><p>  15.3.1.2Assumption123</p><p>  15.3.1.3Simulation results125</p>

89、<p>  15.3.1.4Conclusion128</p><p>  15.4Simulation results for compressed mode129</p><p>  15.4.1Simulation assumptions for compressed mode by spreading factor reduction129</p>

90、<p>  15.4.2Simulation results for compressed mode by spreading factor reduction130</p><p>  15.4.2.1Summary of performance results130</p><p>  15.4.2.2Results131</p><p&g

91、t;  Annex A:Change History135</p><p><b>  Foreword</b></p><p>  This Technical Report has been produced by the 3rd Generation Partnership Project (3GPP).</p><p>  The

92、contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG w

93、ith an identifying change of release date and an increase in version number as follows:</p><p>  Version x.y.z</p><p><b>  where:</b></p><p>  xthe first digit:</p&g

94、t;<p>  1presented to TSG for information;</p><p>  2presented to TSG for approval;</p><p>  3or greater indicates TSG approved document under change control.</p><p>  yt

95、he second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc.</p><p>  zthe third digit is incremented when editorial only changes have been incorporat

96、ed in the document.</p><p><b>  1Scope</b></p><p>  During the UTRA standards development, the physical layer parameters will be decided using system scenarios, together with implem

97、entation issues, reflecting the environments that UTRA will be designed to operate in.</p><p>  2References</p><p>  The following documents contain provisions which, through reference in this

98、text, constitute provisions of the present document.</p><p>  ?References are either specific (identified by date of publication, edition number, version number, etc.) or nonspecific.</p><p> 

99、 ?For a specific reference, subsequent revisions do not apply.</p><p>  ?For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document),

100、 a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.</p><p>  [1]3GPP TS 25.101: "Universal Mobile Telecommunications System (

101、UMTS); UE Radio Transmission and Reception (FDD)".</p><p>  [2]3GPP TS 25.102: "Universal Mobile Telecommunications System (UMTS); UTRA (UE) TDD; Radio Transmission and Reception".</p>

102、<p>  [3]3GPP TS 25.104: "Universal Mobile Telecommunications System (UMTS); UTRA (BS) FDD; Radio transmission and Reception".</p><p>  [4]3GPP TS 25.105:"Universal Mobile Telecommunic

103、ations System (UMTS); UTRA (BS) TDD; Radio transmission and Reception".</p><p>  [5]Tdoc SMG2 UMTS L1 5/98: "UTRA system simulations for the multi-operator case", Oslo, Norway, 1-2 April 1998

104、.</p><p>  [6]Tdoc SMG2 UMTS L1 100, 101/98 (1998): "Adjacent Channel Interference in UTRA system, revision 1".</p><p>  [7]Tdoc SMG2 UMTS L1 465/98: "Balanced approach to evalu

105、ating UTRA adjacent Channel protection equirements", Stockholm, 14-16 October 98.</p><p>  [8]Tdoc SMG2 UMTS L1 694/98: "The relationship between downlink ACS and uplink ACP in UTRA system",

106、Espoo Finland, 14-18 December 1998.</p><p>  [9]ETSI TR 101 112 (V3.1.0): "Universal Mobile Telecommunications System (UMTS); Selection procedures for the choice of radio transmission technologies of t

107、he UMTS (UMTS 30.03 version 3.1.0)".</p><p>  [10]Pizarrosa, M., Jimenez, J. (eds.): "Common Basis for Evaluation of ATDMA and CODIT System Concepts", MPLA/TDE/SIG5/DS/P/001/b1, Septembe

108、r 95.</p><p>  [11]Concept Group Alpha - Wideband Direct-Sequence CDMA, Evaluation document (Draft 1.0), Part 3: Detailed simulation results and parameters, ETSI SMG2#23, Bad Salzdetfurth, Germany, Oct

109、ober 1-3, 1997.</p><p>  [12]TSG RAN WG4 TR 25.942 V 2.0.0 (1999) "RF System Scenarios"</p><p>  [13]TSG RAN WG4#3 Tdoc 96/99: "TDD/FDD co-existence - summary of results",

110、Siemens</p><p>  [14]TSG RAN WG4#6 Tdoc 419/99: "Simulation results on FDD/TDD co-existence including real receive filter and C/I based power control", Siemens.</p><p>  [15]TSG RAN

111、WG4#7 Tdoc 568/99: "Interference of FDD MS (macro) to TDD (micro)", Siemens.</p><p>  [16]ETSI TR 101 112 (V3.2.0): "Universal Mobile Telecommunications System (UMTS); Selection procedures fo

112、r the choice of radio transmission technologies of the UMTS".</p><p>  [17]Evaluation Report for ETSI UMTS Terrestrial Radio Access (UTRA) ITU-R RTT Candidate (September 1998), Attachment 5.</p>

113、<p>  [18]J.E. Berg: "A Recursive Model For Street Microcell Path Loss Calculations", International Symposium on Personal Indoor and Mobile indoor Communications (PIMRC) '95, p 140 - 143, Toronto.<

溫馨提示

  • 1. 本站所有資源如無特殊說明,都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請下載最新的WinRAR軟件解壓。
  • 2. 本站的文檔不包含任何第三方提供的附件圖紙等,如果需要附件,請聯(lián)系上傳者。文件的所有權益歸上傳用戶所有。
  • 3. 本站RAR壓縮包中若帶圖紙,網(wǎng)頁內(nèi)容里面會有圖紙預覽,若沒有圖紙預覽就沒有圖紙。
  • 4. 未經(jīng)權益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
  • 5. 眾賞文庫僅提供信息存儲空間,僅對用戶上傳內(nèi)容的表現(xiàn)方式做保護處理,對用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯,并不能對任何下載內(nèi)容負責。
  • 6. 下載文件中如有侵權或不適當內(nèi)容,請與我們聯(lián)系,我們立即糾正。
  • 7. 本站不保證下載資源的準確性、安全性和完整性, 同時也不承擔用戶因使用這些下載資源對自己和他人造成任何形式的傷害或損失。

評論

0/150

提交評論