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Rust is not thick, can use steel wire brush, steel wire cloth to wipe the surface, until the instinctive quality with stainless steel pipe, reoccupy cotton rub-up.
锈蚀不厚，可用钢丝刷、钢丝布擦拭表面，直至露出不锈钢管本色，再用棉纱擦净。
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