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石墨铜套我们还称之为自润滑铜套，都是以铜套为基体在摩擦面打上排列有序、大小又合适的小孔，在这些孔内镶入石墨，这样就成了我们所需要的带自润滑能力的石墨铜套了。
Graphite copper sleeve is also called self-lubricating copper sleeve. It is based on copper sleeve, and holes with orderly arrangement and proper size are drilled on the friction surface, and graphite is inserted into these holes, so as to become the graphite copper sleeve with self-lubricating ability that we need.
石墨铜套既然是我们的自润滑铜套，那要达到所需要的自润滑效果，肯定要石墨占比达到一定程度才可以达到自润滑效果。在我们的石墨铜套铸造厂家我们都是按照20-30%的比列，这个比列可以保证铜套基体的强度，同时有达到润滑效果。
Since graphite copper sleeve is our self-lubricating copper sleeve, in order to achieve the required self-lubricating effect, the graphite proportion must reach a certain degree to achieve the self-lubricating effect. In our graphite copper sleeve foundry factory, we are in accordance with the ratio of 20-30%, which can ensure the strength of copper sleeve matrix and achieve lubrication effect at the same time.