ash pit closed vent system的意思|示意
美 / /
英 / /
灰坑密闭排气系统
ash pit closed vent system的网络常见释义
闭式灰坑通风系统 ... closed ash pit 密闭灰坑 pit access door 底坑检修门 ash pit closed vent system 闭式灰坑通风系统 ...