城市: city; town; abad; conurbatio ...煤气: coal gas; gas供应: supply; accommdate城市煤气供热: heating by town gas城市煤气: city gas; town gas煤气供应: gas supply煤气供应局: public body controlling the supply of gas for domestic and industrial use煤气供应网: gas distribution network煤气供应站: gas distribution plant城市煤气管道: town gas pipe城市煤气；家用煤气: town gas城市煤气；民用煤气。: town gas点火煤气供应: ignition gas service煤气供应方法: gas distributing system城市煤气代用品: town gas substitute氧气-城市煤气切割: oxy-town-gas cutting氧气-城市煤气烧嘴: oxy-town gas burners城市燃气供应系统: gas supply system都市煤气: town gas中国城市煤气技术发展中心: china urban gas technology development center煤气供暖: gas heating煤气供暖机: gas heater氮气供应: nitrogen supply净气供应: fresh air supply空气供应: air supply
