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球墨自润滑铜套（滚针轴承）
Spheroidal graphite self-lubricating copper sleeve (needle roller bearing)
1.铜合金镶嵌式固体润滑剂自润滑轴承，结合铜合金的耐磨性和固体润滑剂的自润滑性能，使用过程无需加油维护
1. Copper alloy inlaid solid lubricant self-lubricating bearing, combined with the wear resistance of copper alloy and self-lubricating performance of solid lubricant, no refueling maintenance is needed in the use process.
2.采用耐磨损柔软度度好的高力黄铜，镶嵌石墨固体润滑材料，可以更好地保护桥体延长自身使用寿命（使用寿命是普通滚针的3-5倍，价格仅仅是1倍）
2. The use of high-strength brass with good wear resistance and softness and graphite solid lubrication material can better protect the bridge body and prolong its service life (service life is 3-5 times as long as that of ordinary needle roller, and the price is only 1 times as long as that of ordinary needle roller).
3.根据工况情况，可以选择使用各类型的铜合金
3. According to the working conditions, various types of copper alloys can be selected and used.
4.彩盒包装（大吨位包装袋），防尘保护，标示清楚
4. Color box packaging (large tonnage packaging bags), dust protection, clearly marked