Ecmolin
[医] 鱼素
🗣️ 情景例句
How's that?
这是怎么一回事？
How can I get in touch with you?
我怎样能跟你联络上？
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。