GB 20800.3-2008

General rules of explosion-protect techniques of reciprocating internal combustion engines for explosive atmospheres - Part 3: Group I engines for use in underground workings susceptible to firedamp and/or combustible dust

爆炸性环境用往复式内燃机防爆技术通则 第3部分：存在甲烷和（或）可燃性粉尘的地下矿区巷道用I类内燃机