英文關鍵字
above
aerial
area
barrow
blue
brown
clay
construction
contamination
delf
devastated
earth
environment
equipment
europe
excavation
extraction
field
grading
ground
heavy
industrial
industry
kaolin
landscape
mine
minerals
open
opencast
outdoor
output
picking
pit
pitrun
pollution
production
quarry
quarrying
soil
strip
surface
technology
texture
top
toxic
truck
view
work
yellow