高温炉烟管道
high temperature furnace flue gas pipeline
石灰窑煤气管道改造
reconstruction on the gas conduits of limekiln
陕京二线输气管道工程
the Second Gas Transportation Pipeline Engineering
燃气管道信息系统
gas pipe information system
美国夏延输气管道
American XiaYan gas pipeline
埋地燃气管道
pipelines buried underground
embedded fuel gas conduit
buried gas pipeline
埋地钢质燃气管道
underground steel gas pipeline