Preferably, the metal-foil electrical feed-through comprises a central foilportion (3A;
优选地， 金属箔馈电通路包括中心箔部（3A；
2
The first and second foil end portions issue from the vessel end portion.
第一与第二箔端部从容器端部伸出。
3
According to the invention, at least a portion (3A, 3B) of the metal-foil electrical feed-through is arranged in the vessel end portion in a plane substantially perpendicular to the longitudinal axis.