If the steel wire brush wear, change.

若发现钢丝刷磨损严重, 应及时更换.

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Use sand cloth or steel wire brush to clean both tube and cut to bright metal.

清除管道和切割部位,使其金属表面发光发亮.

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Use sand cloth or steel wire brush to clean both ends to a bright metal finish.

使用纱布或钢丝刷清除管道和切割部位,使其金属表面发光发亮.

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