سخّان ECS بغلاف مزدوج ECS heater jacket Réchauffeur ECS double enveloppe Zasobnik z płaszczem CWU Ohřívač s dvojitým pláštěm ECS Riscaldatore ACS Tank met interne tank wisselaar Author: The QElectroTech team License: see http://qelectrotech.org/wiki/doc/elements_license