FM和CSA: Type X Pressurization and Explosionproof for Class I, Division 1,Groups B, C and D. T1~T4 Type X and Y Pressurization for Class I, Division 1,Groups B, C and D. T1~T4 ATEX: II2G Ex d px IIB+H2 T4...T1 Gb IECEx: Ex d px IIB+H2 T1...T4 Gb TIIS: Ex pd IIB+H2 T1~T4