压

The rolling wheel of D51 rolling loop machine is fixed with an expansion ring and its axial locating accuracy is high so the processing difficult of rolling wheel is reduced.

D51型辗环机辗压轮系采用涨圈固定，轴向定位精度高，简化了辗压轮的机械加工；下支承轴端圆锥孔后面设有方孔，辗压辊与下支承轴的联接可靠，更换容易，减少了非生产性工作消耗，提高了劳动生产率。

One or two revolutions, and then turn the feed hand wheel in the opposite direction

4.2.2 当摆杆压到调整块时，即达到所需滚压深度，停止转动进给手轮，待压轮在原位置上

Turn the feed hand wheel to make the pinch roller touch the pipe, turn on the

4.2.1 转动进给手轮使压轮与管子接触，开动机器，然后转动手轮使压轮逐渐压入管子。

In recent years, with the piezoelectric ceramic driver in the field of precision measurement in the wider use of domestic and foreign scholars in the field of piezoelectric ceramic drive power to do a lot of work, all dedicated to the development of piezoelectric ceramic micro-displacement institutions drive Power.

近些年，随着压电陶瓷驱动器在精密测量领域中的广泛应用，国内外学者在压电陶瓷驱动电源领域做了大量工作，研制出各种专用于压电陶瓷微位移机构的驱动电源。

Based on the testing analysis of microcosmic digital image, there are smaller Fissions, higher density and even distribution under high confining pressure than under low one. Microcosmic damage mechanics of rock cracking under high confining pressure and hydraulic pressure is given. Reliable testing basis is offered to analyze further failure and stability of the noncircular cave surrounding rock under high confining pressure and high hydraulic pressure.

通过微观数字图像试验分析发现，高围压条件下大理岩断口裂纹长度小、密度大、分布相对均匀，给出高水压高围压作用下岩石破裂产生的微观损伤力学机理，为进一步分析高围压高内外水压条件下非圆形洞室围岩失稳破坏机理提供了可靠的试验依据。

Gland – two piece gland bushing/packing flange is self-aligning to prevent stem damage for cocked gland.

填料压盖-两件式填料压盖衬套/填料法兰能够自动校准，以防止由于填料压盖翘起造成阀杆损坏。

When an elastic substrate in half-plane was subject to indentations by a rigid, flat-ended punch, a singular stress field and K-dominant region should arise adjacent to the punch edges. When the intensification of such singular stress fields reaches its critical value, fracture will take place on the surface of the contact boundary.

由于周期阵列刚性压头压在半平面弹性体的表面时，会产生周期的Ⅰ型奇异压应力场，该奇异应力场的应力集中达到一定程度时，即达到临界条件时，该奇异应力场所在的边界将开裂。

The research result about abnormal pressure shows insufficiency of compaction disequilibrium as the sole cause of high pore fluid pressures, and tectonic compression, aquathermal expansion, diagenesis, hydrocarbon generation etc also can be the generating mechanisms.

一般认为欠压实是最主要的异常高压成因机制。由于构造挤压引起压应力的改变，由于水热膨胀、成岩作用、烃类生成等引起体积的膨胀，或由于流体流动和浮力作用也可产生异常超压。

In view of the high risk, low success ratio and poor effect of ultra-deep reservoir fracturing, the state of the art of ultradeep well fract.

压裂是低渗透储层最具进攻性的增产措施，然而超深井压裂改造的成功率和有效率低，压裂改造技术已成为制约超深致密储层能否有效开采的瓶颈技术。

All the test results showed that this water-in-oil emulsion fracturing fluid posseses such advantages as good themal stability, good shearing stability, low filter loss, low hurt, good restrainting the inflation of clay material, easy breaking of emulsion and flowback and so on, and then it can replace the conventional oil base gel and be used in fracturing the low pressured and strong water sensitive reservoirs of Gars oil field, Qinghai Province.

研究结果表明，该油包水乳化压裂液具有热稳定性好、耐剪切、低滤失、低伤害、能够较好的抑制粘土水化膨胀以及易破乳返排等优点，可以代替常规油基冻胶压裂液用于尕斯油田中浅层强水敏、低压油藏的压裂改造。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。