insolateur dit sandwich

OBS: Pluriel : des sandwichs; des sandwiches.
OBS: sandwichs (pl.) : Cette graphie, puisée des Rectifications de l'orthographe recommandées par le Conseil supérieur de la langue française, est attestée dans le Petit Robert (2006).

OBS: Two metal sheets are dimpled in corresponding locations and spotwelded together. The sheets are then welded along their perimeter. The resultant panel is filled with a supply pipe at one end and a return pipe at the other. Heat transfer liquid is then able to flow through the sandwich, soaking up heat absorbed by practically the entire surface of the collector.