They are rough, because they did washing, cooking, and sewing for the family and cleaning for the department stores all the year round.

这双手很粗糙，因为一年到头都要为家里人洗衣，做饭和缝补，还要在百货公司里打扫清洁。

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When cleaning fish, avoid rough treatment because wounds in the flesh can allow the spread of bacteria.

清洗鱼时，避免因处理粗糙的肉可以让伤口传播病菌。

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ACF filter is made of rough filter, filtering cylinder, clean component, and impulse automatic cleaning unit.

ACF式自洁式空气过滤器件由粗过滤器、滤筒、净化室、脉冲自动清洗装置等组成。

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