英文關鍵字
bulldozer
carrying
construction
copper
danger
day
dump
dumpbody
dust
earth
engineering
equipment
excavator
heavy
huge
industrial
industry
iron
land
large
loading
machine
machinery
metal
mine
mining
mover
moving
open
ore
outdoors
oversized
overweight
pick
pit
power
quarry
road
shovel
steel
tractor
transportation
truck
trucking
vehicle
very
work
working
yellow