英文關鍵字
aluminum
beam
building
circular
construction
craftsman
craftsmanship
cut
cutting
electric
energy
equipment
facility
factory
glimmering
glowing
grinder
hand
industrial
industry
instrument
inventory
iron
manufacturing
material
mechanism
metal
metalware
metalwork
modern
production
protection
rotary
saw
sawing
sparks
steel
technology
tool
welder
welding
work
worker
workshop