2． Structure illustration
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1.Seat tube
2.Quick lock
3.Reflector
4.Mudguard
5.Brake disc
6.Motor
7.Valve
8.Folding system
9.Battery box
10.Charge port
11.Controller box
12.Chain
13.Chain wheel
14.Pedal
15.Crank
16.Mudguard
17.Handle bar
18.Quick lock
19.Stem
20.Folding system
21.Headlight
22.Brake disc
23.Shock absorbe
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