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自行车/维护和修理/工具和用品/椀形垫圈安装工具
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来自维基教科书，面向开放世界的开放书籍
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自行车
|
维护和修理
|
工具和用品
椀形垫圈安装工具
将耳机的下部垫圈安装到前叉的皇冠上。
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书籍：自行车
华夏公益教科书
