機器
bore
boring
breaker
breaking
build
bulldozer
construction
cracking
crushing
dig
digger
digging
drill
driller
drilling
earth
engineering
equipment
excavation
extraction
green
greenery
hammer
heavy
heavyduty
hydraulic
hydraulic hammer
industrial
jackhammer
jackhammer working
machinery
mountain
perforator
perforator stone
power
rotary drill
steel
stone
stones
structure
technology
tracked
tractor
wide angle
work
working
yellow