Use bellows mechanical seal the cost is too high, but the service life is longer than the first two, maintain or change relatively trouble.
使用波纹管机械密封的的成本太高，可是使用寿命长于前两种，维护或者改换时斗劲麻烦。
This paper shows the construction of hydrodynamic oil seal SR. and discusses its properties and service life through test.
本文介绍“SR”流体动力油封的结构，通过试验更进一步论述“SR”流体动力油封的密封性能和使用寿命。
The research on deformation of rubber piston of slush pump provides a basis of improving the seal properties and increasing the service life of the piston.
泥浆泵橡胶活塞变形的研究，可为改进活塞的密封和寿命性能提供依据。
This paper introduces optimal control of packing seal to creatfavourable conditions for improving seal performance and increasing seal service-life.
本文着重介绍了填料密封方面诸因素的最佳控制状态，从而对提高密封性能、延长密封周期创造了良好条件。
Direct coaxial structure, high efficiency, small size, light weight, installation and maintenance easy. 6. Mechanical seal, long service life.
同轴直接式构造，效率高，体积小，重量轻，安装保养容易。6.采用机械密封，使用寿命长。
The stainless steel centrifugal pump uses the water cooling mechanical seal, extends the mechanical seal service life effectively.
不锈钢离心泵采用水冷却机械密封，有效延长机械密封使用寿命。
This combination of disc springs and dual valve seal rings protects against expansion and contraction due to heating and cooling. This ensures dependable operation, even after years of service.
盘簧与两个密封环的组合，可防止因加热或冷却产生的膨胀和收缩，由此确保阀门即使使用多年后仍运行可靠。
Article 77 a receipt shall be required for every litigation document that is served and it shall bear the signature or seal of the recipient of the service and the date of receipt.
第七十七条【送达回证】送达诉讼文书必须有送达回证，由受送达人在送达回证上记明收到日期，签名或者盖章。
Mud seat is equipped with a four skeleton oil seal and the sleeve to prevent shaft wear and tear, extending the service life of shaft.
泥浆泵座中装有四只骨架油封和轴套，防止轴磨损，延长轴的使用寿命。
The service of the self-sealed valve in Urea Plant with ammonia technic was introduced, and the cause of the seal leakage was analyzed, the solution of local maintenance was pointed out.
介绍了自密封阀在氨汽提尿素装置中的应用情况，对其泄漏原因进行了分析；并提出了具体维修方案。
The seal ring is placed overhead to extend the service life.
密封胶圈上置，延长使用寿命。
This material possesses a lower friction coefficient, better wear-resistance and seal ability with water medium. Its service life is superior to that of the imported seal material.
这种材料在水介质中具有较低的摩擦系数和较好的耐磨与密封性能，其使用寿命优于进口的密封材料。
The seal ring made from exotic materials features such specialties as high-temperature resistance, abrasion-resistance, long service-life, etc.
特殊材料制成的密封圈，具有耐高温。耐磨损、使用寿命长的特点。
This certificate is valid for three months and not used for litigation and military service. It is invalid without the seal of hospital and signature of physician.
本证明书效期三个月，非供诉讼、兵役使用，未经诊断医师签章及未加盖处印，均属无效。
In addition, employing gluing process greatly improves seal and service life of plungers and advanced process is used instead of that for the home-made products of the same kind.
同时也利用胶水配合的工艺，从而大大提高了柱塞的密封性及使用寿命。先进的工艺以代替了国内同类产品。
At present, the problems of hydraulic cylinder is about serious internal leakage, seal failure, crawling and the short service life.
目前，回转窑所用的挡轮液压缸存在的问题是内泄大、密封失效、产生爬行及使用寿命低等。
Using spraying technique, the constructing time is shorter, the whole seal result better, and service life longer. This method has got very good results in practical application.
采用耐火纤维喷涂技术喷敷炉衬，具有施工周期短、整体密封性能好、使用寿命长的特点，经实际应用取得了明显的效果。
Block in the mud with four skeleton oil seal and sleeve to prevent shaft wear and prolong the service life of shaft.
泥浆泵座中装有四只骨架油封和轴套，防备轴磨损，延伸轴的应用寿命。
The factory by the expert who specialized is engaged in seal production development supervises and manages personally, is a production, sell a dragon self-service industry.
工厂由专业从事密封件生产研制的专家亲自监管，是一个生产、销售一条龙的自助型产业。
Exterior built modular mechanical seal with a water-cooled devices, greatly improving the service life.
机械密封 并配有水冷装置，大大提高了使用寿命。
With the above structure, operation of the seal is stable, and the service life is long.
采用本实用新型结构的密封运行平稳，使用寿命长。
Swivel packing seal assembly is the key of the swivel, whose function directly influences its service life, further more, and affects the drilling speed.
盘根密封是(水)龙头的关键环节，其性能直接影响(水)龙头的寿命和钻井速度。
This wellhead equipment join style for flange join, Possesses installation convenience, Tear open install rapidly, Seal up dependable, Valve's service life long feature.
本井口装置联接方式为法兰联接，具有安装方便、拆装迅速，密封可靠，阀门的使用寿命长等特点。
It introduces formulation design of the compound and development of labyrinth oil seal. The sealing property, ageing resistance arid service life in oil resistance and fitting test are also related.
介绍迷宫式油封的胶料配方设计和试制，在耐油老化和装车运行考验中，其密封性好、耐老化、寿命长的特点，使橡胶迷宫式货车轴承密封装置的优越性得到较好地体现。
The result of the field test shows that, by using the new sealing assembly, the oil seal wear caused by offset can be effectively prevented, therefore the service life of…
现场使用证明，这种介杆密封装置能有效地防止介杆油封的偏磨，从而可延长油封使用寿命，增强密封效果。
The imported bearings and oil seal are adopted to guarantee longer service life.
传动轮改进，更换轴承油封快速方便，延长大轴承使用寿命。
The exhausting anti-plugging device is good in seal effects, safe and reliable in operation, meanwhile, the service life of the seal ring is also greatly prolonged;
该排气防堵装置密封效果好，使用安全可靠，同时也大 大的延长了密封圈使用寿命；
The whole chassis seal design, had greatly extend the air filter, oil filter, oil and the service life of the separator;
整体底盘密封设计、极大延长空气滤清器、油过滤器、油细分离器的使用寿命；
The whole chassis seal design, had greatly extend the air filter, oil filter, oil and the service life of the separator;
整体底盘密封设计、极大延长空气滤清器、油过滤器、油细分离器的使用寿命；
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