機器
activity
architecture
automobile
backhoe
beam
build
car
cement
city
concrete
construction
contractor
crane
cranes
development
digger
dirty
earth
equipment
foundation
ground
heavy
hook
house
hydraulic
industrial
industry
job
lifting
machinery
metal
mixer
mobile
outdoor
powerful
process
pump
road
service
site
soil
steel
street
swinging
town
transportation
truck
vehicle
worker