機器
area
asia
background
bangkok
basement
big
brown
build
city
construct
construction
crane
develop
development
dig
dirt
dirty
dump
duty
earth
environment
equipment
excavate
excavation
excavator
gravel
ground
heavy
industrial
industry
labor
lift
machinery
metal
mud
operate
people
progress
singapore
site
space
steel
transport
transportation
truck
vehicle
work
workers
workplace