Table 4 Coding table of test factors.

From: Study on digging form of mechanized harvesting of Cyperus esculentus and optimization test of device parameters

No.

Factors

Bent corner α/(°)

Turning radius R /(mm)

Razor-sharp angle \(\beta\)/ (°)

−1

110

140

25

0

130

150

30

1

150

160

35

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