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YD T 2148-2010 Test methods of optical transport network (OTN) 《光传送网（OTN）测试方法》.pdf 90

YD T 2148-2010 Test methods of optical transport network (OTN) 《光传送网（OTN）测试方法》.pdfYD T 2148-2010 Test methods of optical transport network (OTN) 《光传送网（OTN）测试方法》.pdf

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YD T 2147-2010 Test methods of Nx40Gbit s optical wavelength division multiplexing (WDM)systems 《N×40Gbit s 光波分复用（WDM）系统测试方法》.pdf 49

YD T 2147-2010 Test methods of Nx40Gbit s optical wavelength division multiplexing (WDM)systems 《N×40Gbit s 光波分复用（WDM）系统测试方法》.pdfYD T 2147-2010 Test methods of Nx40Gbit s optical wavelength division multiplexing (WDM)systems 《N×40Gbit s 光波分复用（WDM）系统测试方法》.pdf

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YD T 2146-2010 Technical framework for carrier network-aware P2P traffic optimization 《基于承载网感知的P2P流量优化技术总体技术要求》.pdf 18

YD T 2146-2010 Technical framework for carrier network-aware P2P traffic optimization 《基于承载网感知的P2P流量优化技术总体技术要求》.pdfYD T 2146-2010 Technical framework for carrier network-aware P2P traffic optimization 《基于承载网感知的P2P流量优化技术总体技术要求》.pdf

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YB T 4435-2014 Pressure regulating valve bank《调压阀组》.pdf 10

YB T 4435-2014 Pressure regulating valve bank《调压阀组》.pdfYB T 4435-2014 Pressure regulating valve bank《调压阀组》.pdf

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YB T 4421-2014 Continuously cast round billet for wind power flange《风电法兰用连铸圆坯》.pdf 9

YB T 4421-2014 Continuously cast round billet for wind power flange《风电法兰用连铸圆坯》.pdfYB T 4421-2014 Continuously cast round billet for wind power flange《风电法兰用连铸圆坯》.pdf

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YB T 4420-2014 Cold-rolled strip of high elastic alloy 3J9 for spring《发条用高弹性合金3J9冷轧带》.pdf 7

YB T 4420-2014 Cold-rolled strip of high elastic alloy 3J9 for spring《发条用高弹性合金3J9冷轧带》.pdfYB T 4420-2014 Cold-rolled strip of high elastic alloy 3J9 for spring《发条用高弹性合金3J9冷轧带》.pdf

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YB T 4419 3-2014 Metallized pellet by rotary hearth furnace Determination of potassium and sodium content Inductively coupled plasma atomic emission spectrometr.pdf 10

YB T 4419 3-2014 Metallized pellet by rotary hearth furnace Determination of potassium and sodium content Inductively coupled plasma atomic emission spectrometr.pdfYB T 4419 3-2014 Metallized pellet by rotary hearth furnace Determination of potassium and sodium content Inductively coupled plasma atomic emission spectrometr.pdf

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YB T 4419 1-2014 Metallized pellet by rotary hearth furnace Determination of carbon and sulfur content Infrared absorption method after combustion in an inducti.pdf 8

YB T 4419 1-2014 Metallized pellet by rotary hearth furnace Determination of carbon and sulfur content Infrared absorption method after combustion in an inducti.pdfYB T 4419 1-2014 Metallized pellet by rotary hearth furnace Determination of carbon and sulfur content Infrared absorption method after combustion in an inducti.pdf

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WJ 650-1995 《光学仪器用有色合金砂型铸件规范》.pdf 9

WJ 650-1995 《光学仪器用有色合金砂型铸件规范》.pdfWJ 650-1995 《光学仪器用有色合金砂型铸件规范》.pdf

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WJ 649-1995 《光学仪器用熔模铸件规范》.pdf 11

WJ 649-1995 《光学仪器用熔模铸件规范》.pdfWJ 649-1995 《光学仪器用熔模铸件规范》.pdf

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