防爆標誌為dⅡBT4及dⅡCT4。適用於工廠含有級別為ⅡA、ⅡB，ⅡC級，溫度組別為T1——T4zudekeranxingqiti
，zhengqiyukongqixingchengdebaozhaxingqitihunhewudechangsuo。qizhutikexuanguazaigongziliangguidaoshangzuozhixianhuoquxianyunxing，yikeshaojinggaizhuang
，anzhuangzaigudingjiashang，zuoweiqidiaozhongwuzhiyong。