Portcullised
n. 吊闸；铁闸门\\nvt. 给…装吊闸
🗣️ 情景例句
That's very nice of you.
你真是太好了。
I'm going to try to leave by 10:00.
我争取10点以前离开。
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。