2 Stroke vs. 4 Stroke

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1.
Piston
2.
Crankcase
3.
Sparkplug
4.
Compression
5.
Exhaust
6.
Intake
7.
Powerstroke
8.
Fuel
9.
Oil
10.
Valve
11.
TwoStroke
12.
FourStroke
13.
Teardown
14.
Lawnmower
15.
Chainsaw
16.
Efficiency