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18january

3. 减小尺寸和重量：通过优化设计和使用新材料，减小锥度轴承的尺

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3. 排除润滑不良的方法3. 铜支撑架的承重能力可以达到几十斤

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3. 耐腐蚀性强:陶瓷材料具有良好的耐腐蚀性，能够在潮湿、酸