结构钢架工 structural steel erector

结构钢架底漆 structural steel rimers

结构钢架技工镜头 erector lens

钢架结构 Steel-Frame Construction ; steel frame Structure ; steel frame ; structural-steel frame structure

钢结构支架配管 steel structure bracket tubing

钢结构屋架 steel roof truss structure ; steel roof truss

钢结构网架 steel structural grid

钢结构用网架钢支座 GKQZ

梭形钢结构桁架柱 shuttle-shaped steel truss column