This nonlinear change in friction force over a small change in velocity results in uncomfortable feeling when people hitchhike hydraulic lift.

该摩擦力的非线性改变使速度产生变化，导致人们在搭乘液压电梯时产生不舒适感。

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On the Baosteel continuous casting test platform, the mold friction tests with hydraulic oscillation system were carried out.

基于宝钢板坯连铸试验平台，开展了液压振动下的结晶器摩擦力检测实验研究。

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Furthermore, the friction coefficient of a specimen can be obtained so long as the hydraulic pressure is recorded during testing.

而且只要在试验时记录出液压力，就可求得试件的摩擦系数。

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