Dodecadactylon
十二 指肠
🗣️ 情景例句
I still don't understand what you mean.
我还是弄不懂你是什么意思。
How long did it last?
持续了多久？
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。