阀杆与阀盖之间带倒密封结构，便于阀门带压更换阀杆填料。
Valve rod with valve lids between bring fall airproof structure, Convenients for valve bring press replacing valve stem packing.
采用下装式阀捍，设置倒密封结构，能确保填料处可靠密封。
To adopt lower-installed type valve stem and set up reversed sealing structure can ensure reliable sealing at the position of the stuffing.
带倒密封结构的下装式阀杆，不仅防止了阀杆脱出，而且阀杆部位的密封更加可靠。
The lower-loading Stem with backward sealing construction not only prevents the handle form backing-out but also ensures the reliability of the scaling part of the handle.
采用倒关双密封设计，可带压更换上密封组件，整体阀盖暗杆设计，结构紧凑。
Use back seal design, can replace top seal parts under pressure. Entirety of non-rising bonnet design, have compact structure.
对于不能用矫正根管治疗或用次治疗失败的牙齿，根尖倒充填(其将根管从根尖密封)是个良好的替代方案。
For teeth that cannot be treated with orthograde root canal therapy, or for which it has failed, retrograde root filling, which seals the root canal from the root apex, is a good alternative.
目的研究根尖倒封闭材料镓合金的密封性能。
Objective To study the sealing ability of Gallium Alloy as a root end filling material.
由于通往阀腔的进汽管被密封，凝结水从集水仓流经进水管进入阀腔，倒吊桶下沉，打开排水阀嘴，周期性的开始排水。
When the water level of condensate in the drain sump drops, the cup to shut the admission pipe falls down, the passage for steam to enter into the valve body is opened.
由于通往阀腔的进汽管被密封，凝结水从集水仓流经进水管进入阀腔，倒吊桶下沉，打开排水阀嘴，周期性的开始排水。
When the water level of condensate in the drain sump drops, the cup to shut the admission pipe falls down, the passage for steam to enter into the valve body is opened.
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