DIN 19052-3-1980 Microfilm technics microfilming of engineering drawings reduction ratios for recording on film 35 mm and reenlargement ratio《缩微照相技术 技术图纸缩微照相 在35mm缩微胶片上录制的缩放比列》.pdf

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SNV 70345-1959 《标称尺寸在2 30（正规列）的轻型锥形弹簧垫圈》.pdf

ICONTEC 3227-1991 《在电离以及电子负载条件下，绝缘油吸收的测量方法（皮列利法）》.pdf

ASHRAE 62 2 SPANISH-2007 《低层居民住宅中的通风和可接受的室内空气质量 含附录ANSI ASHRAE 列在附录C修改件中》.pdf

GOST R 50319-1992 Electromechanical switches for use in electronic equipment Sectional specification for in-line package switches《电子设备在使用的机电式开关 成列直插封装开关分规范》.pdf

ASTM D3704-1996(2012) Standard Test Method for Wear Preventive Properties of Lubricating Greases Using the (Falex) Block on Ring Test Machine in Oscillating Motion《在摆动运动中使用(法列克司)环和.pdf

ASTM D3704-1996(2017) Standard Test Method for Wear Preventive Properties of Lubricating Greases Using the (Falex) Block on Ring Test Machine in Oscillating Motion《在摆动运动中使用法列克司环和块磨.pdf

ASTM D3704-1996(2006) Standard Test Method for Wear Preventive Properties of Lubricating Greases Using the (Falex) Block on Ring Test Machine in Oscillating Motion《在摆动运动中使用法列克司环和块磨.pdf

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