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。
Typical applications for compression springs are to provide pressure, as in an electrical contact spring;
压缩弹簧典型的应用时提供压力，比如电子接触弹簧；
If any other questions spring to mind don't hesitate to contact me.
如果你突然想起什么问题，随时给我打电话。
If any other questions spring to mind don't hesitate to contact me.
如果你突然想起什么问题，随时给我打电话。
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