英文關鍵字
aerial
bulldozer
career
coal
coworker
dig
distant
drone
dump
dust
earth
ecological
ecology
energy
engineering
environment
environmental
equipment
exploding
fossil
freight
fuel
geology
giant
heavy
hole
horizontal
huge
industrial
industry
large
load
loader
machinery
machines
mine
mineral
mining
open
ore
pit
power
quarry
resource
rock
sand
special
stone
take
technology
transport
truck
vehicle
view
work
works