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a good seal
相关语句
  良好的密封
     Based on the failure analysis of the mechanical seals for vinyl chloride polymerization autoclaves, a retrofit was made for the seal structure of the autoclaves, and a good seal result and economic efficiency were obtained.
     通过对氯乙烯聚合釜机械密封的失效分析 ,改进了该釜的密封结构 ,取得了良好的密封效果及经济效益
短句来源
  “a good seal”译为未确定词的双语例句
     ④gypsolith is high quality cap rock with a good seal capacity;
     4膏盐层具有很好的封盖能力,为非常优质的盖层;
短句来源
  相似匹配句对
     A Good Habit
     好习惯
短句来源
     A Good Cook
     好厨师(初一适用)
短句来源
     ,A .
     ,A .
短句来源
     A).
     忍A。
短句来源
     Packing Seal
     填料密封
短句来源
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  a good seal
The higher numbers of oral fimbriae in the former two types of feeders were presumed to be linked to their greater need to create a good seal for feeding purposes.
      
The sealing surface of the copper block in contact with the Lexan cover is lapped to provide a good seal without any gasket.
      
The risk of lens loss can be minimized by ensuring a good seal on the face mask.
      
The major concern has been their ability to etch the enamel to a great enough extent to ensure a good seal.
      
The cold flow property of Teflon re sulted in a good seal.
      
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At present, a main fan used in mine most is axial fan. The air-door used for main fan is driven by a winch. The air-door has a serious air leakage which wast a lot of energy. In winter time, the air-door has a freezing problem, a poor movement. The operation of the air-door is complicated and the reliability is poor. A vertical pneumatic auto air-door is designed by the Sulan Coal Mine Bureau and the operation is good. Base on the vertical air-door, this paper has a study on simulation test of the air-door....

At present, a main fan used in mine most is axial fan. The air-door used for main fan is driven by a winch. The air-door has a serious air leakage which wast a lot of energy. In winter time, the air-door has a freezing problem, a poor movement. The operation of the air-door is complicated and the reliability is poor. A vertical pneumatic auto air-door is designed by the Sulan Coal Mine Bureau and the operation is good. Base on the vertical air-door, this paper has a study on simulation test of the air-door. Operation data and law obtained from the study. Therefore, it could be favourable to make a air-door design. After the test study and theoreticla analysis, this paper provided several characteristics of the air-door. 1. The air-door can be auto controlled. Therefore it can simplify the ventilation system. 2. The air-door has a good seal function, a good reduction in energy and increasement of reliabilty and safety. 3. Interlocked movement of the air-door eliminated a dead point of door closing and increased the reliability.

作者对高温采面的热力特性进行了研究,结合平顶山矿务局八矿的实例,对其测定方法和计算等进行了探讨。

If a P-T packer is used in a shallow or an extra-shallow well,it is difficult to ensure a sufficient string weight being applied to keep a good seal of packer elements,therefore the packer is easy to be loosened or released when the string is manipulated to open and close the well,causing failure of the test ARROW1-X,a new type packer can always keep proper setting and seal while it is in compression or tension,the mechanical locking unit may support the pressure differential from above or below...

If a P-T packer is used in a shallow or an extra-shallow well,it is difficult to ensure a sufficient string weight being applied to keep a good seal of packer elements,therefore the packer is easy to be loosened or released when the string is manipulated to open and close the well,causing failure of the test ARROW1-X,a new type packer can always keep proper setting and seal while it is in compression or tension,the mechanical locking unit may support the pressure differential from above or below the packer,the relief system at upper slips makes packer releasing operation easier. Furthermore, application of this packer simplifies the test string design and raises successful ratio of tests. An actual test in Badi 4 well of Inner Mongolia (production casing: 177. 8mm ×255. 09m,perforations: 146. 0~ 158. 0m) proves applicability of the system. The packer is also specially suitable for tests in underbalanced wells.

在浅井和超浅井中使用P—T封隔器,难以保证胶筒密封所需的足够吨位,且进行开关井操作时极易提松或解封封隔器,造成测试失败。ARROW1-X新型封隔器在受压或受拉状态下均可坐封并保持其密封性,其机械锁定装置能够承受来自封隔器上方或下方的压差,上卡瓦释放系统使解封操作更简易。同时使测试管柱结构更加简化,测试成功率更高。经在内蒙古巴地4井测试(油层套管177.8min×255.09m;射孔井段146.0~158.0m),证明其可行性。该封隔器也特别适宜于负压井测试。

In this paper, the friction and wear behaviors as well as wear - resistance mechanism of a new kind of PTFE/TLCP alloy composites were studied, experimental results showed that TLCP can in - situ form micro fibers in the composite inside so that PTFE was greatly reinforced and its wear resistance was significantly enhanced, while at the same time the friction coefficient of the composite only increased slightly. This new composite is likely to be a good seal material.

本文将热致型液晶与聚四氟乙烯(PTFE)混合,用模压烧结的方法制备出新型的原位复合材料,实验发现这种改性后的塑料合金的耐磨性比纯PTEE有了很大的提高,是一种有应用前景的密封材料.

 
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