另外提醒一下如果电脑板按键接触点不良的，先要调好按键，不然强行试机不会成功。
Also a reminder if the computer board button contact undesirable, to adjust button, or force test machine will not succeed.
经查是与四通阀线圈串联的控制继电器触点接触不良，电阻增大，致使电压降低。
The check is in the series of coil and four-way reversing valve control relay contact resistance increases, the bad, the contacts the voltage reduced.
由于长期使用继电器触点上接触不良。
The touch points are not firmly connected due to long time usage of relay.
因牙体缺损的邻接不良或食物嵌塞严重，需恢复邻面接触点者。
Tooth defect with bad proximal relation and food impaction need recover proximal contact.
因牙体缺损的邻接不良或食物嵌塞严重，需恢复邻面接触点者。
Tooth defect with bad proximal relation and food impaction need recover proximal contact.
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