annulus loss

英

美

环面损失

Comprehensive face-lifting is in maintaining the most time-consuming, the one annulus of manpower and material resources, if undertake often, fibre of carpet of can severe loss, change quickly the need of carpet.
全面翻新是保养中最耗时间，人力和物力的一环，若频繁进行，会严重损耗地毯纤维组织，加速更换地毯的需要。
At users 'convenience in fields, the calculating steps and samples were given which quantitatively analyzed the influences of drill stem offcenter, drill pipe rotation and tool joints on annulus pressure loss.
通过实例计算，定量分析了钻柱偏心、钻柱旋转和钻柱接头对环空压力损耗的影响。
Using the conical and exponential inlet/ outlet tubes, guiding annulus and perforated tube may reduce effectively the resistance loss of silencers, while the influence of them on the acoustic attenuation performance is marginal at lower frequencies and considerable at higher frequencies.
采用锥形和指数形进出口管、进出口导流环以及穿孔管均能有效地降低流动阻力损失，而对消声器的低频消声性能影响较小，但对中高频消声性能影响很大。