Mechanical method is to use wire brush or wrapped with wire cloth in the tube of the tube, and drag scale get rid.
机械方法是用铁丝刷或用铁丝裹上布条在管内来回拖动，把管内的水垢消除掉。
Mechanical method is to use wire brush or wrapped with wire cloth in the tube of the tube, and drag scale get rid.
机械方法是用铁丝刷或用铁丝裹上布条在管内来回拖动，把管内的水垢消除掉。
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