1)WU-TWC Warm Up Three-Way Catalytic Convertor,暖车三元触媒转换器2)Three-way catalytic converters,三元触媒转换器3)WU-OC Warm Up Oxidation Catalytic Convertor,暖车氧化触媒转换器4)Two-way catalytic converter,二元触媒转换器5)CCO Catalytic Converter for Oxidation,氧化触媒转换器6)TWC Three Way Catalytic,三元触媒
