它上面有一个纽,扳成与地面平行,就可以放水了,打开任何热水龙头也一样。不打开减压阀或水龙头,只关进水阀,放不出热水。
它上面有一个纽,扳成与地面平行,就可以放水了,打开任何热水龙头也一样。不打开减压阀或水龙头,只关进水阀,放不出热水。
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