通用桥式起重机 限界尺寸 Boundary dimensions of E.O.T.cranes

机动工业车辆 控制符号 Powered industrial trucks--Control symbols

涡轮分子泵性能测试方法 Methods of measurement of the performance characteristics of tubo-molecular pumps

往复活塞压缩机机械振动测量与评价 Measurement and evluation of mechanical vibration of reciprocating piston compressors

 制冷剂编号表示方法 Number designation of refrigerants