For $k\gg 1$, there is an open set $Y_{2r}\supset W_{k}\supset Y_{r}$ such that $(W_{k},\omega_{k},\Omega_{k})$ admits a equivariant special lagrangian fibration $f_{k}:W_{k}\longrightarrow B_{k}$ of phase $\theta_{k}$ over $B_{k}\subset\mathbb{R}^{n}$, i.e. there is a $\Gamma$-action on $B_{k}$, $f_{k}$ is a $\Gamma$-equivariant map, and $f_{k}$ is a special lagrangian fibration of phase $\theta_{k}$, i.e.

$$\omega_{k}|_{f_{k}^{-1}(b)}\equiv 0,\ \ \ {\rm Im}e^{\sqrt{-1}\theta_{k}}\Omega_{k}|_{f_{k}^{-1}(b)}\equiv 0,$$

for any $b\in B_{k}$.