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对双金属镶铸件压铸铝合金汽缸设计要求Ｔ６热处理一事提出讨论，认为技术上存在问题，经济上不合算，使用上也不必要，属于不合理要求。
It is unreasonable to discuss the design of T6 heat treatment requirements for die-casting aluminum alloy cylinder of bimetal castings, which is technically problematic, uneconomical and unnecessary to use.