查询词典 seal cutting

A front-back seal ring structure is adopted in the pump to prevent the liquid from leaking from the high-pressure area to the low-pressure area. The front seal ring is mounted on the pump body while the back seal ring mounted on the bearing body. They should be changed when they are so worn-out that they have an effect on the efficiency and self-priming performance of the pump after the operation for a long time.

泵内部防止液体由高压区向低压区泄漏的密封机构是前后密封环，前密封环装在泵体上，后密封环装在轴承体上，当泵经长期运转密封环磨损到一定程度，并影响到泵的效率和自吸性能时，应给予更换。

A front-back seal ring structure is adopted in the pump to prevent the liquid from leaking from the high-pressure area to the low-pressure area. The front seal ring is mounted on the pump body while the back seal ring mounted on the bearing body. They should be changed when they are so worn-out that they have an effect on the efficiencyself-priming performance of the pump after the operation for a long time.

泵内部防止液体由高压区向低压区泄漏的密封机构是前后密封环，前密封环装在泵体上，后密封环装在轴承体上，当泵经长期运转密封环磨损到一定程度，并影响到泵的效率和自吸性能时，应给予更换。

Several effective seal structures are introduced for improving the seal performance of the stretching machine' oil-seal.

为了提高牵伸机油封的密封性能，本文介绍了几种切实可行的密封结构。

The main reason is the unreasonable design of seal has been found out by analyzing the seal problems of the stretching machine' oil-seal.

摘 要：通过对牵伸机油封出现的密封问题的分析，发现其主要原因是密封设计的不合理。

Additionally, the results showed that the Antarctic seal hairs and sediments including seal excrements well preserved the historical information of ancient civilization over the past several thousand years, and the fluctuations of Hg concentration in the seal hairs and the excrement sediments were found to be closely coincided with ancient activities of gold and silver mining

另外，南极海豹毛和生物粪土层中还保存了过去几千年人类文明的历史信息，汞含量的波动与人类冶金文明的盛衰存在明显的响应关系。

The conclusions show that the new type of seal fabrication is self-tightening. The original clearance between the cylinder and plunger is not the main cause of leakage. The new seal fabrication method is superior to traditional designs, and can seal up to 1 GPa.

结果表明：新型的超高压动密封结构是一种自适应的动态密封结构；初始间隙对密封性能的影响表现出不敏感性，新型超高压密封是可行的密封结构，可实现1 GPa压力的动密封。

Shanghai Power Technology Co., Ltd is a photosensitive material professional seal manufacturer .1999 strong abundance photosensitive seal pad production, making China become the United States, Japan, after the third stamp pad capable of producing photosensitive and intellectual property rights have an independent country, the Chinese fill important gaps in the seal industry.

上海强丰科技有限公司(Shanghai Power Technology Co。， Ltd)是光敏印章材料的专业生产厂家。1999强丰光敏印章垫投产，使中国成为继美国、日本之后的第三个能生产光敏印章垫并拥有独立知识产权的国家，填补了中国印章业的重要空白。

The new ideas from this paper: using mechanics principle study of soil, create a practical test to prove that it could change the physical mechanics character of base soil completely, reducing distortion, improving strength, and eliminating wet or sinking of base soil by seal extrusion during hole formation process at certain replacement rate; it could strengthen the loessial soil base to high bearing capacity to standard value of 300 to 400kPa through seal extrusion to hole formation technology together with rammed cement soil pile. Some value of the parameters adopted by bearing capacity calculation of the composite base of rammed cement soil pile with seal extrusion to hole formation exceeded the criteria of 'Technical Regulation on Building Ground Treatment'.(JGJ79-2002) This technology meet the design requirements and save investment.

本课题的创新点：1 利用土力学原理进行研究及理论推导，并经实践：证明了在置换率为某一定值的情况下，在成孔过程中通过挤密作用可以从根本上改变地基土的物理力学性质，使地基土的变形减小，强度提高，湿陷性消除；2 挤密成孔工艺与夯实水泥土桩的组合，可使低强度的湿陷性黄土地基变成高强度的复合地基，其承载力特征值可达 300~400kPa；3 挤密成孔法夯实水泥土桩复合地基承载力计算所采用的有关参数取值范围超出了《建筑地基处理技术规范》JGJ79-2002 中的有关规定；4 在节省投资的前提下，解决了地基高承载力、低变形及黄土湿陷性问题，达到了设计要求。

Ring is the most frequently used seal in hydraulic cylinder. It's typical lip seal, which is able to gain good seal effect no matter in piston or piston rod.

型圈是液压缸中最常用的油封，它是一种典型的唇口密封件，无论用于活塞还是活塞杆都能获得良好的密封效果。

Waterproof functions and construction of prime coat and sub- seal coat of expressway;2. The lower seal coat used in construction usually has two functions,connection for penetration and protection for seal coat .

我们在施工中所采用的下封层往往都具有双重作用，既要有透层的联结作用，又要有封层的保护作用，因此在北方路面中基层与面层间设置联结层具有十分重要的意义。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。