機器
apprenticeship
caucasian
checking
control
engineer
engineering
equipment
factory
hardhat
helmet
horizontal
industrial
industry
instrument
job
machinery
machining
male
man
manager
manual
manufactory
manufacture
manufacturing
mechanic
metal
occupation
operating
precision
production
professional
protective
repairman
safety
serviceman
skill
standing
teaching
team
technician
technology
tool
trainee
training
turning
work
worker
workman
workshop