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- Gradient multi-setting cement slurry system can take the place of double stage cementing in long isolation sections in certain degree, and it displaces many advantages. 对于封固段较长的固井作业,采用梯度多凝水泥浆体系,在一定程度上可以代替双级固井,具有很强的优越性。
- The accessories of MSC/HSC Stage Cementer include a first-stage plug, free-fall opening plug, closing plug, shut-off baffle and pumping-down opening plug. 重力塞为流线形，内部装有铅，投塞后快速自由下落至下滑套上并形成密封。
- The HSC-A Hydraulic Stage Cementer features inner closing structure, opening through pressure difference. The closing plug drives the closing sleeve down and then shut circulation ports. 型压差式双级注水泥器为内关闭式结构，不需投重力塞，通过液体的压力差打开循环孔，关闭塞带动关闭套下行关闭循环孔。
- But the two stage tools used to so far are mostly required to drill the rubber plug or cement plug out after the cementing job is done. 但目前所使用的双级注水泥工具固井后均需用小钻杆钻除胶塞和水泥塞，费用高、时间长。
- There are many spotlights on the stage. 舞台上有很多聚光灯。
- Please dim out the stage for the final scene. 请在最后一场即将开演时使舞台灯光转暗。
- The singer was led off the stage by the maestro. 歌唱家由那位著名的指挥领着离开了舞台。
- I always get the jitters before I go on stage. 我登台之前总是感到紧张。
- She did the first stage of the trip by train. 她行程的第一段是乘火车的。
- She's wanted to go on the stage from an early age. 她从小就想当演员。
- The singer got the bird when she came out on stage. 这位歌手一出现在舞台上人们便以嘘声嘲弄她。
- The disease is still in its primary stage. 这疾病仍然在初发阶段。
- Negotiations were at a crucial stage. 谈判正处于一个关键的阶段。
- The technique is still at the experimental stage. 这项技术正处于实验阶段。
- The actors were booed off the stage. 演员被倒彩声轰下了台。
- The reform is at its critical stage now. 改革正处于关键阶段。
- The last few minutes before going on stage scow new actors up. 上台前的最后几分钟常常使新演员很紧张。
- A lot of electric lamps illumined the stage. 舞台由许多电灯照亮。
- He quitted the stage of politics. 他退出了政治舞台。
- She stood alone on the enormous stage. 她孤零零地站在巨大的舞台上。
