英文關鍵字
aerial
coal
conveyer
drone
equipment
geology
granite
heavy
industrial
industry
iron
machinery
mine
mineral
mining
nature
ore
quarry
soil
summer
transport
truck
unloading
vehicle
英文關鍵字
aerial
coal
conveyer
drone
equipment
geology
granite
heavy
industrial
industry
iron
machinery
mine
mineral
mining
nature
ore
quarry
soil
summer
transport
truck
unloading
vehicle