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3A21

3A21

3A21

3A21

1

Then had a regression analysis of force data using the EXCEL software to establish the 3A21 regression model of cutting force .

利用 EXCEL 软件，对切削力数据进行回归分析，建立起 3A21 铝合金铣削力数学模型。

2

The forming limit of 3A21 Aluminum alloy sheet was tested and the forming limit diagram ( FLD ) was determined .

通过标准成形极限实验获得 3A21 铝合金板材的成形极限图（FLD ）；

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