quickly ; copper or iron ore
永远不要反转转盘为钻铤和管子上扣。
Never reverse rotary table into the DC or any tubular when making up connections.
youdao
不许在井架上排放用不着的钻杆和钻铤。
Do not leave pipe or collars that are not in use standing in mast or derrick.
这是钻杆丝扣油,不能用在钻铤丝扣上。
The pull rod is screwed into the inside thread of the anchor head.
铤,从金,廷声。本义是未经冶铸的铜铁,有用尖刃向前猛刺意。铤而走险指没有办法,只得冒险。
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