abstract

action

active

chains

circle

clockworks

cogs

complexity

concepts

convert

cooperate

curve

driving

efficiency

engine

engineering

equipment

factory

gears

groove

human

industrial

industry

invention

isolated

machinery

machines

manufacturing

mechanics

motion

motor

objects

operation

parts

pinion

power

progress

revolve

rim

teamwork

technology

tools

tooth

transform

turning

wheels

work