D=2,
ti/si= 4D +2~
se/te= 3D +2~
fi/ni= 2D +2~
ne/fe=1D +2~
where 10= full use and 4= limited use
D=2,
ti/si= 4D +2~
se/te= 3D +2~
fi/ni= 2D +2~
ne/fe=1D +2~
where 10= full use and 4= limited use
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