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+Using chemformula package with babel-russian.
+
+DESCRIPTION
+
+The chemformula package and babel-russian settings (russian.ldf) define the same macro \ch.
+The package chemformula-ru undefines babel's macro to prevent an error when
+both packages are loaded together.
+Optionally it redefines the \cosh macro to print the hyperbolic cosine
+in Russian notations and/or defines new macro \Ch for that.
+
+Licence: LPPL 1.3c or any later version.
+
+Alexey Kuznetsov mailtokuznetsov@gmail.com
+