发布时间:2025-01-31 06:52:40
如图,从图上箭头所指的边框任意一处用一字起子撬起,就能取下边框里面的罩子,这样就好换灯管了,换好再安装罩子。
燃气热水器的烟管要用隔热阻燃材料包裹20mm可是具体用什么材料呢
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