为了避免出现运动部件的过早磨损、噪音或振动运行，就要根据流体状态选择止回阀的通径。

Premature wear and noisy operation or vibration of the moving parts can be avoided by selecting the size of check valve on the basis of flow conditions.

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该系统正在迅速落伍，由于DIS和有更少运动部件和磨损因素的每罐线圈的引入，测量火花塞的电压是要求在不同条件下能跳掉插头。

This system is quickly becoming obsolete due to the introduction of the DIS and coil per cylinder systems with fewer moving parts and wear factors.

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利用这些模型可数值模拟水轮机中含沙水流的流动、沙粒在水轮机过流通道内的浓度分布、运动轨迹及水轮机过流部件的磨损率。

These models can be used to predict the sandy water flow in hydraulic turbine, the sand particle trajectories in hydraulic ducts and the wear rates of hydraulic turbine components.

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