英文關鍵字
aerial
construction
deep
digging
germany
gravel
heavy
high
industry
looking
mine
mining
over
panorama
pit
porphyry
quarries
quarry
quarrying
rock
stone
surface
view
whiten
英文關鍵字
aerial
construction
deep
digging
germany
gravel
heavy
high
industry
looking
mine
mining
over
panorama
pit
porphyry
quarries
quarry
quarrying
rock
stone
surface
view
whiten