%% Taken from #1558
\documentclass{article}
\usepackage{cleveref}
\crefname{pluralequation}{eqs.}{eqs.}
\begin{document}
\begin{equation}
  E = m c^2 \qquad R_{\mu\nu} - \frac{1}{2} R g_{\mu\nu} + \Lambda g_{\mu\nu} = \frac{8\pi G}{c^4} T_{\mu\nu}
  \label[pluralequation]{eqs:einstein}
  \label{eqs:einstein2}
\end{equation}
\end{document}
