2 problems

Let $\pi\colon M\to B$ and $\theta\colon N\to B$ be smooth fibre bundles of compact manifolds over the same base, with normal $\Gamma$-coverings $p\colon \widetilde M\to M$ and…

Let $\pi\colon M\to B$ be a smooth fibre bundle of compact manifolds, let $p\colon \widetilde M\to M$ be a normal covering with torsion-free deck-transformation group $\Gamma$, and…