求翻译：本文选用石墨对铜粉PTFE改性。测试PTFE复合材料的摩擦磨损性能，发现加了石墨和铜粉的PTFE复合材料较之纯PTFE摩擦磨损性能有了很大提高。是什么意思？

This article selection of graphite the ptfe modified on copper powder. Test ptfe composite friction and wear properties and found that the addition of graphite and copper powders, ptfe composite materials has been greatly improved friction and wear properties compared to pure ptfe.

This selection of copper powder graphite PTFE living modified organisms. Test the friction wear PTFE composite performance and found that the graphite and copper powder composite PTFE PTFE than pure performance friction wear has been greatly improved.

This article selects the graphite to the copper powder PTFE modification.Tests the PTFE compound materials the friction attrition performance, discovered added the graphite and the copper powder PTFE compound materials had the very big enhancement compared with the pure PTFE friction attrition perfo

Choose Copper powder with a graphite PTFE modified this article. Tests of friction and wear properties of PTFE composites, found that adding the powdered graphite and copper than pure PTFE friction and wear properties of PTFE composites have been greatly improved.

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