在分类为电气危险区域中使用的所有设备及材料，应经审核认定可用于此类区域并使用认可的方式进行安装。
All equipment and materials provided for use in areas classified as electrically hazardous shall be approved for use in such areas and shall be installed in an approved manner.
在分类为电气危险区域中使用的所有设备及材料，应经审核认定可用于此类区域并使用认可的方式进行安装。
All equipment and materials provided for use in areas classified as electrically hazardous shall be approved for use in such areas and shall be installed in an approved manner.
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