...gear with internal heating: Achie Wyffels, Roeselare...
4395132 Stirring gear with internal heating: Achie Wyffels, Roeselare, Belgium, assigned to Constructie Werkhuizen Vandekerckhove N Vdoi:10.1016/0198-7593(84)90016-xELSEVIERJournal of Heat Recovery Systems