钻铤 meaning in English
bottom collar
dc: drill collar
drill collar porta-mechao
drillcollar
Examples
- Please measure drilling collar first , then drilling pipe
先量钻铤，再量钻杆。 - Connect the feeling plate to the drill collars
用钻铤连接探深板。 - Have you measured those spiral collars and flex joints ? not yet
你量过那些螺旋钻铤和挠性短接吗？还没有。 - We need a short drill collar
需要一根短钻铤