abstract
architect
architecture
background
blue
blueprint
built
cad
car
city
construct
construction
contour
design
diagram
document
draft
drafting
draw
drawing
engine
engineer
engineering
gear
graphic
green
illustration
industrial
line
mechanical
mechanics
mechanism
object
outline
page
paper
parts
pattern
pencil
plan
plot
print
projection
scheme
shape
sketch
technical
technology
template