GB 20800.3-2008
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
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