Spiling
[集合词]木桩, 木材, 桩材
🗣️ 情景例句
How many languages do you speak?
你会讲几种语言？
It takes time.
这需要时间。
and we control it by means of the mud which we circulate down the drill pipe.
我们让泥浆顺着钻杆向下循环，用这种方法来控制压力。