step buffer seal 踏板缓冲器密封
step buffer seal assembly 踏板缓冲器密封总成
two-piece step type buffer seal 组合式阶梯型缓冲器密封
Step combination seal 阶梯组合封
If a stable column of mud has been set up in the well, keeping the oil at bay through its sheer weight, the next step would be to set cement in the well and seal it off permanently.
如果一个稳定的泥浆柱能在油井里成型，并通过它十足的压力将石油限制在海湾范围，那下一步就是将井里的泥浆粘合好，使油井永久封闭。
"We now have a high volume process for manufacturing sodium fill valves," said Schaefer. "We drill the holes, fill them with sodium and seal them all in one step."
“我们现在拥有了一种高集成的中空充钠气门生产工艺，”Schaefer说，“钻孔填钠密封，一步就可以搞定。”
The last step is to hold the above materials to seal a new seal.
最后一步就是持以上办理的材料到印章店刻一个新的印章了。
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