Intertwiner in german? What is the best way to translate the mathematical term ''intertwiner'' (between two representations of a group) into German?

Excuse me if mine is a very low-brow approach.  
Let us look at the English Wikipedia page Equivariant Maps (cf. here), where there is the definition of Interwiners, as a special kind of equivariant maps.
Then let us switch to the German version, and we find that, in the same context, it is  employed just the term äquivarianten Abbildung.  
I hope it helps. Bye.
Edit Added because the OP need not only tranlations but references to actual usage.
In the German literature you'll find it also in the abbreviated form $G$-Abbildung as for example here in Tammo Von Dieck's Topologie,
(In order to overcome the difficulties you report in comments, here is the exact physical reference: Chapter I, Section 10, second paragraph on page 41.)
