密封

According to the problem exiting pneumatic change direction valve,by using the good property of engineering ceramic material,a new pneumatic change direction valve with ceramic valve core as seal pairs have be designed.

根据气动换向阀存在的问题，利用工程陶瓷材料的优良性能，设计出采用陶瓷阀芯作为密封副的新型气动换向阀，并进一步阐述了陶瓷阀芯换向阀的工作原理和特点。

Square plate in accordance with the sealing performance of different chain can pump water height are not the same.

根据方板的密封性能的不同，链泵所能提水的高度也不尽相同。

It was sealed by a wall and contained chalky soil to the depth of one metre.

它被一堵墙密封著，仿如白垩时期的泥土深达一公尺。

We wish these decrees, statutes and ordinances to be deposited in our chancellery and that letters in public form, under the seal of our vice-chancellor, be drawn up and handed over to those who wish to have them.

我们希望这些法令，规章和条例，以存放在我们chancellery ，并以书面通知，在公共形式，根据密封的，我们校长，制订并移交给那些想要有。

The Institute of Design Refit but be accomplished on changing water ventilation style charge oxygen sealing off the luck fish device being to transport the live fish basis directly in the plastic bag, it can be on the march in the lower , relaxed condition fleetness field not loosening a plastic bag changing water aeration.

1达州职业技术学院，四川达州635001；2中国农业大学，北京 100094）(宋体小5号居中)摘要：本研究所设计的换水换气式充氧密封鱼苗运输装置是直接在塑料袋运输活鱼基础上改装而成，它能在不松开塑料袋的条件下，轻松快速地进行换水换气。

Purpose: To test Check Valve No. 1 for tightness.

目的：检测2号关闭阀的密封性。

Legionnaires disease can be prevented by proper chlorination (treatment of water with chlorine) and sealing of water supplies.

军团病是可以预防的，由适当的加氯和密封水的供应。

Chlorination for the majority of applications, the best choice of EPDM seal NP pump head.

对于大多数加氯的应用，最好选用EPDM密封的NP泵头。

The valves feature a replaceable abrasion resistant Chloroprene seat, a 304 stainless steel seat guided gate, and PTFE packing.

这种阀门配置可更换的耐磨损氯丁二烯阀座，304不锈钢阀座引导的闸板，以及PTFE密封填料。

Both sides of sealing performance are choiceness and the torque is small.

详细说明 1、双向密封性能优良，扭矩值小。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！