Nitroplasticizer
硝基增塑剂
🗣️ 情景例句
So, why don't you call him in the morning?
那么你为何不明天早上打个电话给他？
I hope you have a good trip.
祝你旅途愉快。
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。