钻工使用气动旋扣器卸开扣，或者如果可能，司钻用顶驱卸开扣。
The Floormen spin out the connection using the air spinner, or if applicable, the Driller utilises the top drive to spin out the connection.
论述了开底泥驳卸泥性能取决于船舶自身的有关参数，同时取决于土壤特性。
It is discussed that the dumping performance depends on the parameters of hopper barge and also the characteristics of soil.
在黄淮地区破裂井壁治理技术中，开切环形卸压槽是最关键的技术之一。
In the prevention techniques of fracture shaft lining in the Yellow and Huai River areas, the channeling of circular relieving slot is one of the key techniques.
在黄淮地区破裂井壁治理技术中，开切环形卸压槽是最关键的技术之一。
In the prevention techniques of fracture shaft lining in the Yellow and Huai River areas, the channeling of circular relieving slot is one of the key techniques.
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