英文關鍵字
assemble
assembling
assembly
billet
blank
conveyor
detail
enterprise
equipment
factory
fixing
hand
human
industrial
industry
insert
iron
job
line
man
manual
manufacture
manufacturing
mechanic
mechanical
mechanician
metal
metalworking
parts
people
plant
process
production
steel
threaded
tool
unit
work
worker
workers
working
workplace
workshop