| 摘要 |
The specification discloses a method for forming thin metal, television tube magnetic shields by blanking "lazy C" shaped blanks from a strip of thin metal, forming the blanks around a truncated pyramidal form so their edges overlap, mash seam welding the overlapping edges so as to eliminate open space between the overlapping portions and forming a peripheral flange by bending the outer edge of the thus formed truncated pyramidal member.
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