punching tong是什么意思 punching tong在线中文翻译

punching tong

punching tong 双语例句

1. In this paper the PLC hydraulic pneumatic control system of the punching process of iron roughneck was proposed for the walking power tong.
   为满足国内对钻井设备自动化程度越来越高的要求，进一步提高液压大钳的自动化程度，基于行走式动力大钳提出了铁钻工上扣过程的PLC液压气动控制系统。

punching tong