and资源列表
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[国外标准] JIS B1130-2006 Screw and washer assemblies with plain washers-Washer hardness classes 200 HV and 300
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[国外标准] JIS B1060-2003 Mechanical and performance requirements of case hardened and tempered metric thread r
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[国外标准] JIS B0909-1993 Shock and vibration measurements-Characteristics to be specified for seismic pick-ups
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[国外标准] JIS G0417-1999 Steel and iron-Sampling and preparation of samples for the determination of chemical