英文關鍵字
automated
automobile
boring
business
construction
cut
cutting
danger
electronic
energy
engineering
engraving
equipment
fabrication
factory
fire
flames
flat
heat
industrial
industry
laser
light
machine
machinery
machining
manufacture
manufacturing
material
mechanical
metal
metalwork
metalworking
modern
plant
plasma
precision
processing
production
sheet
shop
spark
steel
technology
tool
welding
work
working
workpiece
workshop