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Mathematical Problems in Engineering
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Special Issues
Mathematical Problems in Engineering
/
2021
/
Article
/
Tab 2
/
Research Article
The Study of Subsurface Land Drainage Optimal Design Model
Table 2
Calculation of
ψ
,
λ
, and
ε
factors for the values of
β
1
,
β
2
, and
β
t
[
22
].