The ventilation and dust removal in welding workshop are important protects for the labors.

车间的通风除尘是对作业人员非常重要的劳动保护措施之一。

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The ventilation and dust removal in welding workshop are important protects for the labors.

车间的通风除尘是对作业人员非常重要的劳动保护措施之一。

youdao