app
architect
blueprint
civil
cog
coloured
contractor
development
engineer
engineering
factory
gear
hard
hard hat
hat
helmet
icon
idea
industrial
job
laptop
light bulb
machinery
manufacture
manufacturing
mechanical
microscope
occupation
operator
pictogram
presentation
production
professional
protect
protection
protective
research
safe
safety
screen
signs
site
stroke
talk
technician
thin
uniform
wear
work