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虹吸触点式流量自记仪是根据水导电的原理， 利用开关电路控制电磁铁带动记录笔，记录定量泄流的次数， 并通过机械转动装置偶合， 达到连续自记流量的目的。该设备能保证流量观测精度， 又具有结构简单， 操作简便等特点。
Siphon contact flow meter is based on the principle of water conductivity, the use of switching solenoid control circuit drives the stylus to record the number of quantitative discharge, and through the mechanical rotation device coupling to achieve the purpose of continuous self-recording flow. The device can ensure the accuracy of flow observation, but also has a simple structure, easy operation and so on.