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- The Kelly rock valve, simple in its structure, easy to handle, reliable to operate, is a very important part of blowout prevention system during drilling. 方钻杆旋塞阀结构简单、操作方便、使用较可靠,已成为钻井钻柱内防喷系统的重要组成部分,在现场广泛使用。
- The teenagers were rocking about. 那群少年正合着摇摆音乐的节拍跳舞。
- He sat rocking (himself) in his chair. 他坐在椅子上前後摇动著。
- Have you turned off the water valve? 你关掉水阀了吗？
- She got the baby off (to sleep) by rocking it. 她摇著婴儿哄他入睡。
- The rock was honeycombed with passages. 岩石上有许多蜂窝状的小孔。
- Many young rock hounds grow up to be geologists. 许许多多爱好收集岩石的少年，长大后成了地质学家。
- We need an eye bolt to fit this valve. 我们需要一个有眼螺栓来固定这个阀门。
- The climber had to negotiate a steep rock face. 那攀登者得攀越一陡峭岩石。
- This layer of rock contains a lot of flint. 这一岩层中有大量燧石。
- He soon detected the faulty valve. 他很快查到了出毛病的阀门。
- The water had worn a channel in the rock. 水把岩石冲出了一条沟。
- He dash the glass bowl to bit on a rock. 他对著石块把玻璃碗砸得粉碎。
- The mountain rise up in a steep wall of rock. 这座山高而陡，形成一道岩石屏障。
- The mountain rose up in a steep wall of rock. 这座山高而陡，形成一道岩石屏障。
- He chiseled that rock into the figure of a woman. 他把那块石头凿成一个女人像。
- The boat was sundered by the rock. 船被岩石撞碎了。
- Deep grooves channelled the soft rock. 在软岩石上形成许多深槽。
- The mason was chipping away at the rock with a hammer. 石匠用锤子一点一点地把那块石头击碎。
- She is crazy about rock and roll. 她喜欢摇滚乐。
