Modular fast-on covers combinable in blocks

摘要

Combinable modular fast SIMILAR ons comprising insulating cases or shells (112) each other fastenable by means of cylindrical reliefs (126) fastened to a first side wall (116a) thereof and engaging corresponding cylindrical slots (130) of a second side wall (116b) of an adjacent insulating shell. The cylindrical reliefs (126) and the corresponding cylindrical slots (130) are so sized in order allow a steady enough engagement to avoid unwanted separation between adjacent each other engaged shells. <IMAGE>