  We establish the exact-order estimates for the approximation of functions
from the Nikol'skii-Besov classes $S^{\boldsymbol{r}}_{1,\theta}
B(\mathbb{R}^d)$, $d\geqslant 1$, by entire function exponential type with some
restrictions for their spectrum. The error of the approximation is estimated in
the metric of the Lebesgue space $L_{\infty}(\mathbb{R}^d)$.
