Multiscreen hardware specialty new employee orientation electric welding scarf electric arc construction steel gas closeup technician flaming steel spark heavy protective welder machinery tool hazardous red day iron explosion welding ironworks may occupation skilled skill worker equipment protection flame cutting industrial safety dangerous manufacturing fire employee metalwork hazard mask smoke factory labor workplace repair industry job construction weld manufacture metal hot collage
の 0“multiscreen hardware specialty new employee orientation electric welding scarf electric arc construction steel gas closeup technician flaming steel spark heavy protective welder machinery tool hazardous red day iron explosion welding ironworks may occupation skilled skill worker equipment protection flame cutting industrial safety dangerous manufacturing fire employee metalwork hazard mask smoke factory labor workplace repair industry job construction weld manufacture metal hot collage” 画像 トが見つかりました 。。