自行车用5号螺栓的BCD（螺栓圆周直径）尺寸表
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Published:2025-12-26 05:13:27
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当时我正试图修理一辆旧自行车，想弄清楚我车架上曲柄的BCD(螺栓圆周直径)参数。偶然间，我发现了谢尔登·布朗
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