英文關鍵字
big
carrying
chile
construction
copper
damage
digging
dirty
dump
dust
earth
engine
engineering
environment
environmental
equipment
get
gold
gravel
hill
industrial
industry
iron
large
load
machine
metal
mine
mineral
mode
mover
moving
open
ore
outdoors
oversizes
overweight
pit
power
quarry
road
rock
slow
tire
transport
transportation
truck
trucking
vehicle
wheel
work
working
yellow