For this purpose, the bristles of the portions with the small diameter D2 of the polishing brush (20) are stiffened with resin.

为此，用树脂加固构成抛光刷(20)中的小直径D2的部分的毛状材料。

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The diameter of the brush head, length and POM (POM) tube inner diameter, outside diameter, length, color can be according to customer requirements processing production.

刷头的直径、长短及POM(聚甲醛)管的内径、外径、长短、颜色都可以按照客户的要求加工生产。

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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.

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。

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