英文關鍵字
build
cargo
cement
concrete
construction
crane
electric
height
installation
loading
materials
mechanisms
production
reinforcement
rubble
structures
technology
walls
welding
worker
英文關鍵字
build
cargo
cement
concrete
construction
crane
electric
height
installation
loading
materials
mechanisms
production
reinforcement
rubble
structures
technology
walls
welding
worker