分别对开口有背压活塞环和整体无背压活塞环的工作原理和结构作了阐述。
The work principle and structures of backpressure piston rings and integral non-backpressure piston rings were expounded.
此试验压力包括工作条件如：背压和高温的校正值。
This test pressure includes corrections for service conditions e. g. backpressure or high temperatures.
由于文章篇幅的限制，仅列出了气源压力、背压对空气锤工作参数的影响规律。
Owing to spatial confined, the paper enumerates air supply pressure and backpressure which influence the working parameter of the DTH hammer only.
简要介绍了它的系统结构、功能与工作原理，并对该调速器进行900余小时多工况配机试验，主要包括起动试验、调速性能试验、转速稳定性试验和耐背压波动试验。
Experiments of over 900 hours matching diesel were done in factory, covering the speed governor's start, speed performance, speed stability, and speed fluctuating with back pressure.
背压调节器的工作以及在应用需要的背压或救济的压力，控制精度高。
Back pressure Regulators work well where applications require high precision control of back pressure or relief pressures.
工作压差是指水力控制阀前的工作压力减去水力控制阀出口背压的差值。
Working pressure is the hydraulic pressure control valve before the working hydraulic control valve back pressure minus the difference.
工作压差是指水力控制阀前的工作压力减去水力控制阀出口背压的差值。
Working pressure is the hydraulic pressure control valve before the working hydraulic control valve back pressure minus the difference.
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