英文關鍵字
angle
angles
billet
blank
cutting
degree
detail
engineer
equipment
factory
finder
gloves
hands
human
industrial
industry
instrument
iron
lie
machine
machining
man
manufacture
manufacturing
material
measure
measuring
metal
metallic
metalworking
plant
process
production
protractor
stainless
steel
technology
tool
unit
work
worker
workpiece
workplace
workshop