機器
big
build
carry
construct
construction
develop
development
dig
dirt
dirty
dump
dumping
duty
earth
equipment
excavation
gravel
ground
heap
heavy
hydraulic
industrial
industry
labor
lift
load
machinery
mechanical
mining
move
operate
outside
pneumatic
progress
site
steel
technology
tip
transport
transportation
truck
vehicle
wheel
work
workplace
zone