英文關鍵字
railcars
dumpcar
wagons
trains
railway
railroad
rails
locomotive
movement
transport
industry
mining
ore
cargo
freight
traffic
quarry
quarrying
pit
mine
industrial
英文關鍵字
railcars
dumpcar
wagons
trains
railway
railroad
rails
locomotive
movement
transport
industry
mining
ore
cargo
freight
traffic
quarry
quarrying
pit
mine
industrial