armature
assortment
beam
blueprints
building
business
cast
conduit
construction
copper
cylinder
diameter
engineer
engineering
equipment
factory
firmness
fittings
fixtures
frame
girder
heavy
industrial
industry
low
manufacturing
material
mesh
metal
metallurgy
metalworking
model
network
pipe
pipeline
poly
polygon
product
production
rolling
round
structure
technology
tube
warehouse
wire
wireframe