Talide
碳化钨硬质合金
🗣️ 情景例句
Her name's Gemma,
它叫做Gemma，
To plan a mountain climbing expedition.
计划登山探险。
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。