特点：电动升降，电动复位，双柱间距离可调。
Feature: electronic rise and down, electronic reset, the distance between the posts can be adjustable.
探讨刮水电动机复位滑环的结构、工作过程、复位误差，使用中存在的问题。
This paper discusses the working procedure, replacement error and the problems in operation of the replacement slip annulus of wiper motor.
电磁阀一般断电可以复位，电动阀要这样的功能需要加复位装置。
Solenoid valve can be reset general power, the electric valve to the function of such devices need to reset.
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