求翻译：本装置在生产过程中的介质主要有甲烷、氢气、一氧化碳、二氧化碳等，其中甲烷、氢气、一氧化碳为易燃、易爆介质，主要生产装置火险类别为甲类，爆炸危险区域划分为2区，故操作人员应了解这些介质的特性，以便检修、泄漏或发生事故时，采取相应的防范措施。主要危险物的物理性质列表如下：是什么意思？

Media in the production process of the device such as methane, hydrogen, carbon monoxide, carbon dioxide, methane, hydrogen, carbon monoxide is a flammable, explosive media, the main production unit of fire insurance category as Category A, the explosion hazardous area classified as Zone 2, operator

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The appliance in the production process of the media mainly methane, hydrogen, carbon monoxide, carbon dioxide, methane, hydrogen and carbon monoxide as flammable, explosive medium, fire of the main production plant categories as category, explosion hazardous area is divided into 2 districts, the op

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