查询词典 service life

According to various of the technical difficulties such as low drilling efficiency in hard rock and short service life of diamond drilling bit, analysis was made on the inherent links between blade-extruding of hot-pressing diamond and rock abrasiveness.

中文摘要：针对在坚硬致密岩石中钻进时效低和钻头使用寿命短的技术难题，分析了热压钻头的金刚石出刃与岩石研磨性等岩性之间的内在联系，认为钻头的胎体成分及其性能是关键，硬而带脆性的胎体性能有利于金刚石出刃，从而能提高钻进速度。

In order to solve the problem of low efficiency and short service life of hot pressed diamond bit when drilling in hard and compact formation, relations between diamond exposure of hot pressed bit and rock abrasiveness were analyzed in this paper. Research on matrix performances of hot-pressed diamond bit was firstly carried out.

针对在硬而致密岩石中钻进时效低的难题，本文分析了碳化钨基热压钻头的金刚石出刃与岩石研磨性等岩性之间的内在联系，认为钻头的胎体成分及其性能是关键，硬而带脆性的胎体性能有利于全刚石出刃，从而能提高钻进速度。

Uses the new material and the spatial crossing linking technology, high absorbability, high water resistant, anti-mildew and long service life.

采用新一代高分子材料与空间交联技术，高吸水、高耐水、抗霉变、使用寿命长。

This design improve the performance of shock absorber and extend the service life of the absorber.

提高了减振器的性能，延长了减振器的使用寿命。

In the hydraulic system uses the accumulator, may the absorption line shock maximum limit, reduce to the variation of load to the adhesive tape the impact, enhances adhesive tape's service life.

液压系统中采用蓄能器，可以最大限度的吸收液压冲击，减小对负载变化对胶带的冲击，提高胶带的使用寿命。

With unique silicone protective film, it can clean glass, protect glass surface layer from acid mist and steam, meantime, prevent drip because of temperature difference, indeed make glass free of spot. The effect shall be better for auto glass, it can availably clean dirt, while taking effect as "lubricating protective film" to reduce friction between rain blows and glass, so protect their service life, leave your visual field brighter.

本品独特的硅酮保护成膜，不但能将玻璃洗干净，更起到保护玻璃表层，不会受到酸雾水气的腐蚀，更能起到防止因温差而出现雾珠，真正使玻璃"无彩无瑕"，如汽车玻璃用效果更佳，不但能有效地清洗玻璃上的尘埃污垢，更能起到以"润滑保护膜"的作用减轻雨刮与玻璃的摩擦力，从而保护两者的使用寿命，使您的视野更明亮。

It is shown from the analysis results that in order to achieve the submarine tunnel service life of 100 years,the side concrete coating thickness in the sea area tunnel section is recommended to be 60 mm and additional reasonable construction error,the con.

通过对胶州湾海底隧道工程所在地的环境作用进行分析，以基于钢筋混凝土劣化模型的设计方法，对海底隧道衬砌混凝土的耐久性进行研究。

Improvement refrigeration effect at the same time, extension air conditioning service life.

改善制冷效果的同时，延长空调的使用寿命。

The present invention has raised atomizing effect, lower cost, anticorrosive and antiwear performance and long service life.

使用发明可有效地提高喷嘴的雾化效果，大大降低投入成本，提高喷嘴的防腐耐磨性能；延长其使用寿命。

The results of industrialized application show that the generator features stable application,long service life, simple structure and good sealing.

工业化应用结果表明：该发生器具有工作性能稳定、寿命长、结构简单、密封性好等一系列优点。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。