无压的

Presented are reasons to select the scheme, developing process of the type-51 body-free perforator, and main operations in perforating and fracturing.

论述了选用该方案的原因，51型无枪身射孔器的研制过程，射孔和加砂压裂施工简况。

Development and application of lead-free piezoelectric ceramics have become the concern of scientists in many countries.

无铅压电陶瓷的开发和应用已经成为各个国家的研究热点。

The preparation method of lead-free piezoelectric ceramic is the key factor to determine its structure,character and application.

无铅压电陶瓷的制备方法是决定其结构、性质和应用的关键因素。

Partial fracturing wells in Sulige Gasfield produces massive sand slurry because of unreasonable proration during their production. Some phenomena occur such as a lot of sand production, accumulation in wellbore, off production due to watered out, and yield decline as well as pressure drop, resulting in influencing the production result to a great extent.

中文摘要：苏里格气田部分压裂井在生产中因配产不合理出现了：①产量过大导致生产大量出砂影响生产；②气井生产流量达不到携带井底积液的要求，区块内出现较大一批积液井、水淹井；③由于配产不合理致使气井生产无稳产期，投产后压力、产量直线下降至废弃压力生产阶段，极大程度上影响了气井的生产效果。

Reactive component of current adds to the loads current and increases the voltage drops across network impedances.

电流的无功部分使负载电流增加并且提升了电网的阻抗压降。

The results, which show that discharge coefficient is determined by inflow structure of RFD and Cp is linear with K when RFD's structure parameter is constant, will promote the development of RFD's fluid dynamics model.

结果表明：流量系数Cd与可逆流体换向装置的入流结构形式有关；当RFD的结构参数恒定时，压能转换系数与无因次参数K呈线性关系。

According to the transformer's equivalent circuit, the value of the current injected to the transformer's secondary winding is controlled, so that the value of transformer impedance in power system can be controlled.

本方案将变压器的一次侧串联接入电网，在电力系统正常运行时，变压器主磁通为零，故障限流器呈现很小的变压器一次侧漏阻抗，压降很小，对电力系统运行无影响。

Results BCC of this group were located in the anterior border of the sternocleidomastoid muscle in its upper 1/3 portion,near the level of the hyoid bone and outside the carotid sheath structures.8 cases were in the left side and 7 cases in the right side.

结果本组鳃裂囊肿均位于胸锁乳突肌上1/3的前缘，相当于舌骨平面，颈动脉鞘的外侧，左侧8例，右侧7例。注射造影剂后无强化现象。囊肿与周围结构界限清楚。囊肿邻近结构有不同程度受压移位。

It is an object to provide preferred organometallic compounds of metals of Groups VIIb, VIII, IX, and X with relatively high vapor pressures and good thermal stability such that they are vaporizable without substantial decomposition.

只能提供给你机器翻译的了，参考一下吧这是一本发明对象提供适合有机金属化学沉积前驱物金属诸如团体VIIB部，第八、第九、十、为首选对象是金属有机化合物群体VIIB部，第八、第九、与X具有较高蒸汽压和良好的热稳定性，使他们无实质性vaporizable分解。

Constant voltage and current, antioxidize case:Insure flux quality accordantly in condition of instable power and air pressure;Soldering paste density without change after long time work.

恒压恒流，防氧化箱：在电源气压不稳定的情况下确保喷雾量一致；助焊剂在长时间的使用保持浓度无变化。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。