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应该是相反,压力开关是个空气控制的小金属片,平常为开路,当排气扇运行时,产生负压,将金属片吸合,形成通路。不用电表测,将压力开关的软管从排气扇端拧下来,很容易操作。用嘴吹气吸气,在吸气时能听到卡拉卡拉金属片吸合的声音,就是开关没问题。

bluesky2000 (bluesky2000)
(#11807369@0)
2018-11-22 -05:00
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