Unicontrol
单向控制, 单向调整
🗣️ 情景例句
Need another box?
需要另一个箱子吗？
How much is it by registered mail?
挂号信要多少钱？
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。