機器
build
building
bulldozer
business
caterpillar
civil
clearing
community
construction
contractor
development
dig
digger
employment
engineer
engineering
equipment
estate
excavation
excavator
heavy
industrial
industry
infrastructure
labour
landscape
loader
machinery
maintenance
management
manufacturing
power
professional
project
real
roadwork
safety
site
skill
sky
sunset
survey
transportation
vehicle
work
worker
workplace