英文關鍵字
activity
backhoe
blue
build
bulldozer
construction
cut
dig
dump
dumper
earth
equipment
excavate
excavation
excavator
gravel
ground
heavy
hoe
industrial
industry
isolated
land
large
load
loader
loading
lorry
machine
machinery
new
open
pit
road
rock
sand
site
tip
tipper
track
tractor
trailer
transport
transportation
truck
vehicle
wheel
working
works
yellow