英文關鍵字
auto
car
component
construction
device
engineering
equipment
factory
fire
flame
forging
forming
gas
hammer
hammering
heat
heavy
hit
hot
impact
improve
industrial
industry
iron
machinery
manufacturing
mechanic
mechanical
metal
metalwork
modify
occupation
part
plant
production
skill
smash
steel
structure
technician
tool
torch
vehicle
work
worker
working
workman
workshop