| Latex |
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\large
$$
L_{lamella} = {{n_{cellsperSheet} \cdot thickness_{sheet} \cdot W_{sed} + 2 \cdot thickness_{sheet} \left( {L_{sed} - L_{lamella} \cos (\alpha )} \right) \cdot n_{sheets} + L_{sed \cdot } W_{sed} - {{Q_{sed} } \over {V_{up} }}} \over {\cos (\alpha ) \cdot W_{sed} }}
$$
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