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furnace filter
Posted by
jiahomeinspection
on April 16, 2012 at 6:15 PM
热风炉过滤网太脏了!都脏成这个样子还不换;每年要更换一次,比换被套还简单。
更换时注意风的流向,遵循箭头(滤网上)指示的方向和风流的方向一致。
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