機器
auger
bore
borehole
building
casing
construction
construction site
dig
digging
drill
drill bit
drilling
equipment
excavate
excavating
ground
groundwork
heavy duty equipment
hole
hydraulic
industrial
industry
iron
machinery
mechanical
metal
perforate
pile
piles
pipe
power
process
project
rebar
reel
rig
rusty
site
sling
soil
steel
technology
tool
transport
vehicle
wire
work
workplace
works