在此之后很温柔尝试刷出纠结的铁丝刷。
After that very gentle try to brush out the tangles with a wire brush.
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.
大管径管子可由几个圆钢刷组装在一起，两端用铁丝扎紧，在管腔内来回拉刷，直至露出金属本色，再用棉纱拉刷干净。
Big diameter pipe can be composed of several round steel brush together, at both ends with wire tightly, within the lumen pull brush back and forth, until the metal color, reoccupy cotton brush clean.
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