Unknown macro: {latex}
\large
$$
{{\Delta h_
Unknown macro: {stock}
} \over {\Delta h_
Unknown macro: {FCM}
}} = {{d_
Unknown macro: {float}
^2 } \over {d_
Unknown macro: {orifice}
^2 }}{{L_
Unknown macro: {float;lever;arm}
} \over {L_
Unknown macro: {valve;lever;arm}
}}
$$