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See Chinese contents: GB 20800.3-2008 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
This part of GB 20800 specifies the safety requirements and (or) safety measures for Group I category M2 reciprocating compression ignition engines for use in underground workings with methane and/or combustible dust (hereinafter referred to as internal combustion engines), which are used to eliminate or limit various dangers and hazards that may occur on internal combustion engines.
