螺旋钻铤 meaning in English
spiral drill collar；spiral-grooved drill collar
Examples
- 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。 - Spiral drill collars made in our plant are in accordance with api standard
本厂制造的螺旋钻铤按照“ api ”标准生产和验收。