英文關鍵字
block
plate
hook
concrete
building
cement
work
crane
industry
house
industrial
construction
panel
worker
metal
floor
steel
engineering
structure
site
iron
new
labor
material
lift
frame
equipment
heavy
lifting
reinforced
sky
surface
nobody
hawser
time
manufacturing
machinery
architecture
half
elevating
holding
tech
load
workshop
pile
business
housing
cargo
wall
design
chain