gas utilization fitter用户气体燃料技工
gas main fitter天然气主装配工
gas pipe fitter煤气管道安装工
gas s fitter煤气工
gas-fitter煤气装修工
gas fitter-installer燃气装配工
Gas Fitter License持有政府牌照
gas fitter apprentice气体装配工学徒;燃气装配工学徒
gas fitter trainee燃气装配工培训人员