The above products have passed national coal mine explosion-proof security product quality supervision and inspection center, explosion-proof test, acquired qualified certificates.
以上产品均已通过国家煤矿防爆安全产品质量监督检验中心测试合格，获得防爆合格证书。
The above products have passed national coal mine explosion-proof security product quality supervision and inspection center, explosion-proof test, acquired qualified certificates.
以上产品均已通过国家煤矿防爆安全产品质量监督检验中心测试合格，获得防爆合格证书。
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