英文關鍵字
big
bulldozer
construction
digger
digging
dirt
dozer
dump
dust
earth
excavation
excavator
extraction
geology
giant
granite
gravel
heavy
huge
industry
large
load
loader
loading
machinery
metal
metallic
mine
mineral
mining
pickup
power
powerful
production
quarry
quarrying
rock
stone
technology
tipper
tool
transport
transportation
truck
work
yellow