{latex}
\large
$$
D_{LfomOrifices}  = RoundNearest(D_{circle} ({{A_{orifice} (B_{LfomOrifice} ,Pi_{LfomH} ,Pi_{VenaContractaOrifice} ,Q_{ramp} (B_{LfomOrifice} ,HL_{Lfom} ,Pi_{LfomH} )} \over {N_{LfomOrificesFirstRow} }}),D_{Drill} )
$$

{latex}