发布时间:2025-02-01 03:06:35
热熔接好以后,七八小时以后就可以通水试水了.放心吧..不过为了保险,一般建议24小时以后再试水.
直流电不能用变压器这个我知道但是如果是大小不断变化的直流电也不可以吗
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