assemble

automatic

automobile

automotive

background

bearing

bolt

box

business

busy

camshaft

car

component

concept

crankshaft

detail

drive

energy

engine

equipment

gear

gearshift

generate

generator

heavy

iron

isolated

mechanical

mechanics

mechanism

motor

oil

open

part

pinion

pollution

power

propulsion

public

rotate

row

section

spares

steel

street

technology

transmission

transport

transportation

valve

vehicle