Apparatus wherein electric or electromagnetic energy is used to create or cause the heat.
(Apparatus wherein electric or electromagnetic energy; is used; to create or cause the heat) (Apparatus wherein electric or electromagnetic energy; to create; ) (Apparatus wherein electric or electromagnetic energy; to cause; the heat)
Apparatus wherein electric or electromagnetic energy Apparatus wherein electric or electromagnetic energy Apparatus wherein electric or electromagnetic energy
is used to create to cause
to create or cause the heat
the heat