2． Instruction Illustration
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1.Seat tube
2.Quick lock
3.Brake disc
4.Motor
5.Valve
6.Folding system
7.Battery box
8.Charge port
9.Controller box
10.Chain
11.Chain wheel
12.Pedal
13.Crank
14.Handle bar
15.Quick lock
16.Stem
17.Folding system
18.Headlight
19.Brake disc
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