cistern
company
complex
construction
constructor
container
contractor
duct
employee
employment
engineer
environment
equipment
facility
factory
foreman
hardhat
industrial
industry
job
labor
male
man
manufactory
manufacture
metal
modern
multiethnic
occupation
outdoors
plant
platform
produce
production
reflective vest
reservoir
service
steel
storage
structure
supervisor
tank
technician
tower
work
worker
workman
zone