blue
circle
cogwheel
compasses
component
concept
connected
construction
cooperating
design
detail
device
diameter
dividers
drafting
draw
drawing
element
engineering
equipment
gearing
geometry
graphic
idea
industrial
interlock
join
machinery
mechanical
mechanism
metal
office
paper
pattern
precision
project
ratchet
simultaneous
sketch
socket
sprocket
structure
synchronized
technical
technology
together
tool
wheel
wrench