Features:The insulation class is B; the protective class is IP44.

特点：绝缘等级为B级，外壳防护等级为IP44。

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There are oil-proof grommets between cover and body, that can reach protective class IP65.

箱盖与箱体之间夹有耐油橡胶胶条，可保证防护等级达到“IP65”。

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Article 52: the material, style and way of wearing of protective garments shall be appropriate to the requirements of operation and cleanliness class and shall not be otherwise used.

第五十二条工作服的选材、式样及穿戴方式应与生产操作和空气洁净度等级要求相适应，并不得混用。

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