以上来源于: WordNet
Oil gate valve reasonable structure, reliable sealing, easy operation.
进口油用闸阀结构合理，密封可靠，操作轻便。
The machine drawn back by hydraulic Pressure of two oil cylinder is a new machine used in the spillway radial gate, it is beginning to be used exactly in our country.
后拉式双缸液压启闭机是新型的弧门启闭机，在我国刚刚开始应用。
This article gives a brief description of a special tool for assembling and disassembling of seal rings in the wedge-shaped gate valve for oil (gas) well-head assembly.
本文简要地介绍了装拆采油(气)井口楔形闸密封圈的一种专用工具。
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