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A: Top tube.
B: Down tube.
C: Head tube.
D: Seat tube.
E: Chain stays.
F: Seat stays.
G: Drop outs.
H: Saddle.
I: Brake lever.
J: Brake cable.
K: Cranks.
L: Spider.
M: Hub.
N: Spoke.
O: Spoke nipple.
P: Chain.
