GB/T 39960-2021闭式单动机械压力机参数和尺寸标准
英文:Straight-sided single-action mechanical power presses—Characteristics and dimensions GB/T 39960-2021介绍: 国家标准《闭式单动机械压力...
英文:Straight-sided single-action mechanical power presses—Characteristics and dimensions GB/T 39960-2021介绍: 国家标准《闭式单动机械压力...