機器
architect
builder
building
business
checking
construction
control
development
discussion
employee
engineer
engineering
equipment
factory
foreman
hardhat
helmet
industrial
industry
job
machinery
maintenance
man
manufacturing
mechanical
metal
occupation
operator
people
plant
production
professional
project
protection
protective
reflective clothing
safety
steel
technical
technician
technology
uniform
work
work wear
worker
workman
workplace
workshop