tubular derrick的意思|示意
管形吊杆；钢管井架
tubular derrick相关短语
1、 duplex design tubular derrick 双管伸缩式钻塔
2、 tubular steel derrick detail 钢管钻塔
3、 tubular r derrick 钢管钻塔
4、 tubular steel derrick 钢管钻塔
tubular derrick相关例句
It is the derrick man's responsibility to ensure that all tubular, fixtures and fittings are secured in the derrick at all times.
井架工的责任是确保井架上的所有管具、固定井架和零部件在任何时候都固定牢靠。