英文關鍵字
aluminum
blurred
building
craftsmanship
cutting
electrical
energy
equipment
fabricating
facility
factory
fire
flashes
glimmering
glowing
heavy
industrial
industry
instrument
inventory
iron
light
manual
manufacture
manufacturing
material
mechanism
metal
metalware
metalwork
metalworking
modern
process
processing
production
professional
spark
sparks
steel
technology
tool
welder
welding
work
worker
working
workshop