我连设备以车床为主,在使用三爪卡盘工作时体力劳动较重,长期来希望改善这种劳动条件,过去我们也使用过机械夹紧装置和学习了油压、气动夹紧装置,因其操作不够方便,结构复杂,范围不广等缺点,没有推广,伟大导师毛主席教导我们说:“人类总得不断地总结经验,有所发现,有所发明,有 I even used lathes as the main equipment. When working with three-jaw chucks, I had to work harder. Over the long term I hope to improve the working conditions. In the past, we used mechanical clamping devices and learned hydraulic and pneumatic clamping devices. Because of its inconvenient operation, complicated structure, and inconsistent scope, it has not been promoted. The great teacher, Chairman Mao, has taught us: "Mankind must constantly sum up experience, discover, invent, and