英文關鍵字
big
construction
dig
digging
earth
engineering
environment
equipment
excavate
excavation
excavator
geology
giant
gold
ground
heavy
hole
industrial
industry
iron
landscape
large
machine
machinery
mine
mineral
minerals
mountain
mover
open
opencast
ore
pit
production
quarry
road
rock
sand
stone
surface
technology
transport
transportation
truck
vehicle
work
yellow