It is both essential and desirable to have a certain defined degree of friction in these electronic gas pedal assemblies.

对于这种电子油门踏板装配来说，摩擦力必须能够达到要求。

youdao

Together with the practical application of the panel turnover gas-lock valve, the factors of the inherent character with the friction effect are also given in this paper.

结合生产实践分析了由于摩擦阻力而形成的翻板式锁气阀所固有的特性及其影响因素。

youdao

Analyses parameter have inclined Angle, pipe diameter size, gas liquid ratio and friction factor and so on.

分析参数有：倾斜角度、管径大小、气液比和摩阻系数等。

youdao

The friction caused by the gas bubble pushing up the pipe and displacing the drilling mud used to control the pressure could have created a static charge that ignited the gas into a fireball.

FORBES: BP's Deepwater Disaster: What Happened And Why?