英文關鍵字
clay
pit
heavy
machine
machinery
industrial
mineral
mine
technology
construction
quarry
manufacturing
power
worker
remove
leftover
operate
mechanism
clean
part
wet
ore
deposit
extraction
adjust
shovel
work
transport
dirt
conveyor
mining
employee
soil
earth
material
factory
job
transporter
geology
dig
environment
plant
people
closeup