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GB/T 3229-2018 螺栓螺母用装配工具手动和机动螺刀头的传动端和连接部件的尺寸及扭矩试验 Assembly tools for scre...2023-06-07

FZ/T 50011-2016合成纤维假捻变形丝残余扭矩试验方法Synthectic filament yarns-Test method for residual torque ...2023-04-16