建立了两片式铝罐尺寸设计的优化模型，讨论了模型的两种次优解。

The size design of optimal model for two pieces Aluminium Can has been established, two kinds of suboptimal solution about the model has been discussed.

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最后给出了两片式不停车收费系统在不停车收费与停车收费两种工作方式下的车道收费流程。

Al last, the lane tolling flow charts of ETC are put forward under non-parking and parking.

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