英文關鍵字
blasting
block
borer
boring
construction
cut
dig
digger
digging
drill
equipment
excavation
extraction
factory
geology
granite
heavy
hose
industrial
industry
jackhammer
limestone
machine
machinery
marble
material
mine
miner
mineral
mining
operator
pit
pneumatic
power
production
quarry
quarrying
raw
resource
rock
shale
steel
stone
surface
technology
tool
work
worker