The above products have passed national coal mine explosion-proof security product quality supervision and inspection center, explosion-prooftest, 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。
2
Check all items in the checklist such as test of content of oxygen test of explosion point exploded-proof lamp good ventilation.
核对检查单并检查所有项目，如测量氧气含量，检验爆炸点，防爆灯和通风。
3
Check all items in the checklist, such as test of content of oxygen, test of explosion point, exploded-proof lamp, good ventilation.