英文關鍵字
excavation
heavy
industry
geology
excavator
machinery
ecology
resources
ore
mineral
equipment
environmental
damage
sustainability
technology
industrial
pollution
environment
valley
production
engineering
digging
work
rock
mountain
top
view
outdoor
deep
stone
landscape
lake
snow
water
nature
ice
sky
mountains
blue
cold
travel
panorama
white
clouds
surface
mining
open
pit
high
country
andes
peru
terraces
commercial
south
america