英文關鍵字
activity
bucket
bulldozer
business
construction
development
digging
dirt
earth
engineer
engineering
equipment
excavator
foundation
gravel
ground
heavy
highway
hydraulic
industrial
industry
infrastructure
land
leveling
loader
machine
machinery
mover
operator
outdoor
outdoors
road
roadwork
rural
sand
scoop
soil
structure
technology
tractor
transport
transportation
truck
vehicle
work
workplace
yellow