吉田牙科综合治疗机是日本八十年代的先进产品，具有性能稳定和使用维修方便等优点。该机结构包括电路和水气路二大部分。电路部分性能稳定，笔者单位的５２台该设备中除因继电器触点氧化、行程开关损坏等引起的椅位控制电路故障偶有发生外，没有出现过其它严重的电路故障... Yoshida dental treatment machine is Japan’s advanced products of the eighties, with stable performance and easy use and maintenance advantages. The aircraft structure, including water circuit and waterway two major parts. Circuit part of the performance is stable, the author’s unit 52 of the equipment in addition to the relay contact oxidation, limit switch damage caused by the seat control circuit failure occasionally occurred, there have been no other serious circuit failure ...