更换羊毛？并检查接触压力。
比磨损率也与温度、气氛和接触压力密切相关。
The specific wear rate is strongly dependent on the temperature, atmosphere and contact pressure.
边触式和下触式集电靴装有弹簧用来提供所需的接触压力。
Side and bottom contact shoes are spring loaded to provide the necessary contact force.
边触式和下触式集电靴装有弹簧用来提供所需的接触压力。
Side and bottom contact shoes are spring loaded to provide the necessary contact force.
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