Henan
n. 河南, 河南省
🗣️ 情景例句
You should have seen the look on his face
真该看看他脸上的表情
What's the time by your watch?
你的表几点了？
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。