英文關鍵字
aggregate
asphalt
background
blend
building
bulldozer
business
car
cargo
cement
city
company
concept
construction
container
deliver
depot
dump
engine
engineering
equipment
excavator
factory
frontal
housing
industrial
industry
job
load
machine
metal
mixer
monolith
monument
new
occupation
process
row
tire
tractor
transport
truck
vehicle
work