bicycle自行车;
tire轮胎;
stem竖管;
tire pump打气筒;
fender挡泥板;
brake lever刹车握把;
rim轮圈;
brake cable闸线;
headlight前灯;
drive chain链条;
front/rear derailleur前/后变速器;
seat post 座杆;
front/rear brake 前/后刹车;
chain stay 后下叉;
seat tube座管;hub轮毂
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