| http://www.w3.org/ns/prov#value | - A heating system for an electrically insulated metal tube (1,37), which is connected to a power supply unit (7) by at least one electrical cable (9,10), characterized in that the at least one electrical cable is a single-conductor cable with a conductor, an insulation and a sheath, wherein the sheath comprises at least two polymer layers, wherein at least one outer layer of the sheath has a mechan
|
