機器
area
beam
bucket
building site
business
cement
cherry picker
civil engineering
column
concept
concrete
construction
edifice
empty
engine
engineering
fitter
girder
ground
hydraulic
industrial
industry
joist
lined
lined up
lorry
machinery
mechanization
metal
nobody
outdoor
parked
pillar
platform
rigger
safety
scene
shade
site
soil
space
truck
used
vehicle
view
wire
work
workplace
zone