英文關鍵字
bulldozer
coal
digger
digging
dirt
dirty
excavate
excavation
excavator
huge
hydraulic
industrial
industry
large
load
loader
loading
machine
machinery
mine
mining
pit
technology
transport
transportation
truck
vehicle
英文關鍵字
bulldozer
coal
digger
digging
dirt
dirty
excavate
excavation
excavator
huge
hydraulic
industrial
industry
large
load
loader
loading
machine
machinery
mine
mining
pit
technology
transport
transportation
truck
vehicle