英文關鍵字
adult
busy
chip
circuit
craftsman
development
electrician
electronic
employee
engineer
engineering
equipment
factory
foreman
hands
holding
indoors
industrial
industry
instrument
job
labor
laborer
maintenance
male
man
manual
manufacture
mechanical
modern
occupation
old
people
person
personal
process
production
profession
professional
soldering
specialist
table
technician
technology
tool
work
worker
working
workman
workplace