英文關鍵字
backhoe
big
bucket
build
bulldozer
construction
conveyor
ecology
equipment
excavator
factory
grader
ground
heavy
hoe
hydraulic
industrial
industry
iron
lift
loader
loading
machine
machinery
mill
operator
orange
piston
power
process
sand
site
technology
track
tractor
transport
transportation
truck
vehicle
work
workflow
yellow