英文關鍵字
craft
craftsman
detail
electrode
engineer
equipment
fabricate
fabrication
factory
flash
gasshielded
gloves
hard
heat
heavy
industry
instrument
iron
job
labor
laborer
labour
maintenance
manual
manufacture
material
mechanic
mechanical
metal
metallurgy
metalwork
occupation
plant
process
production
professional
protective
repairer
repairman
safety
spark
steel
tool
weld
welder
work
worker
workplace
workshop