derrick substructure
常见例句
- Have you fixed the derrick substructure in position?
井架底座固定好沒有? - The tong counter-weights must not rest on derrick sub-floor, derrick substructure sills.
不能讓大鉗平衡鉈靠到鑽台下邊或井架底座上不起作用。
blog.sina.com.cn - The degree of reliability of rig derrick and substructure in different time is obtained by means of reliability evaluation of the zero failure data.
通過對石油鑽機井架、底座無故障數據的可靠性評定,求得了不同時間狀態下符郃實際的可靠度。 返回 derrick substructure