  We propose a new method for the construction of Hamiltonian-minimal and
minimal Lagrangian immersions of some manifolds in $C^n$ and in $CP^n$. By this
method one can construct, in particular, immersions of such manifolds as the
generalized Klein's bottle $K^n$, the multidimensional torus, $K^{n-1}\times
S^1$, $S^{n-1}\times S^1$, and others. In some cases these immersions are
embeddings. For example, it is possible to embed the following manifolds:
$K^{2n+1},$ $S^{2n+1}\times S^1$, $K^{2n+1}\times S^1$, $S^{2n+1}\times
S^1\times S^1$.
