The lifting mechanism after optimization features better characteristics curves of lift force factor and hydraulic pressure.
优化后的举升机构，有较好的举升力系数曲线和油压特性曲线。
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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