機器
architecture
bore
bored
borehole
build
builders
building
cement
concrete
construction
crane
danger
dirt
drill
drilling
driven
driver
earth
earthworks
engineering
equipment
excavation
fabricate
foundation
geological
geology
ground
hammer
heavy
hole
hydraulic
industrial
industry
install
job
machinery
metal
mining
pile
piling
rig
site
soil
steel
technology
work