機器
activity
building site
cement
civil engineering
column
compact
compacting
compactor
concrete
construction
dig
digger
earth
earthwork
edifice
engineering
excavate
excavation
excavator
excess
flatten
flattener
ground
impale
industrial
industry
joist
landscape
leveling
loader
machinery
manage
mechanical
operate
passing over
pillar
roller
scoop
site
skeleton
soil
spike
steamroller
structure
vibrate
vibration
work
yellow
zone