英文關鍵字
agricultural
axle
base
big
billet
black
component
cultivator
detail
driving
engineering
equipment
factory
heavy
industrial
industry
iron
machinery
manufacture
manufacturing
mechanical
mechanism
metal
metallic
metalwork
metalworking
part
parts
pin
plant
process
production
round
spindle
spoke
steel
technology
unit
warehouse
wheel
work
working
workshop