fuel gas distribution main燃气输配管道
gas collecting main集气干线;煤气总管;煤气聚集总管英语;煤气聚集总管
gas s main气体输送管道
gas collecting main pressure集气管压力
gas transportation main pipeline输气干管
rich gas cellar main地下室富煤气主管
gas-main laying works煤气管铺设工程
gas s main laying works铺设煤气总管工程
N（名词） a large pipeline in which gas is carried for distribution through smaller pipes to consumers 煤气总管