機器
activity
architecture
build
building
bulldozer
cement
concrete
construction
dig
digging
engineering
equipment
excavation
excavator
expressways
ground
highway
industrial
industry
job
loader
machinery
operate
outdoors
paving
process
road
roadway
sand
shoveling
site
soil
street
structure
technology
transport
transportation
truck
under
vehicle
way
work
working