绳子从井上方的一个轮子上滑过。
完钻后，只留一个泥浆工程师在井上。
After the well finish, only keep one mud engineer at the rig.
在机采井上采用洗井保护器可以避免洗井水侵入油层。
It could be prevented when a reservoir protection device was used.
救护人员称该名男子从升降机井上摔下来，坠落到电梯井坑内。
Rescue officials say the man fell down the shaft and landed in the elevator pit.
救护人员称该名男子从升降机井上摔下来，坠落到电梯井坑内。
Rescue officials say the man fell down the shaft and landed in the elevator pit.
应用推荐