Once you're on the ice, you drill your holes, line up the holes that are inside the Wilcraft, and press a couple switches to drop the hull onto the ice.

一旦你在冰面上，整齐的地钻一排冰洞都由Wilcraft内部完成，随后按一个双向开关把船体拖放到冰面上。

youdao

Drills (kick drills) according to kick control procedures as required will be performed with the drill string inside the casing shoe.

根据情况，钻具处在套管鞋时，遵照井涌控制程序，搞一次演习。

youdao

Its upper end is drill pipe box or union, the nether end is casing pin. It is a crossover with hollow inside.

它是个上端为钻杆母扣或者由壬，下端为套管公扣，内空心的转换接头。

youdao

The inquest heard Mr Balkwell had been working in a lorry which had broken down - and was using a drill to try to remove the concrete inside when he became trapped.

BBC: Les Balkwell

Inside the riser pipe is a space about half a meter in diameter, large enough to hold the spinning drill pipe and bit and to allow the return flow of drilling fluid.

FORBES: The delicate art of sucking up