Antonelli, Terry, Stout & Kraus
Structure of metal container having trunk pipe and branch pipe, and manufacturing method and apparatus therefor
 A welded metal container for a sheath 1 or 1A of gas insulated switch gear comprises a trunk pipe 2, 21 and a branch pipes 3, 31, 32 welded to the trunk pipe 2,21 by arc welding A or laser beam welding LB and flanges welded to the each end portion of the trunk pipe 2, 21 and branch pipes 3, 31, 32 by the laser beam welding. After the arc welding A, the ends of trunk pipe 1, 21 and branch pipes 3, 31, 32 are machined precisely and flanges 4a, 4b, 4c, 4d, 4f and 4g are welded to the end portions of the trunk pipe 2, 21 and branch pipes 3, 31, 32. 
Hitachi, Ltd.
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inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional additional inventional inventional inventional inventional inventional
Shinji Katsuro Takashi Hideaki Seizo Yutaka Sadao Takashi Masaki Osamu Osamu Koji Masayoshi
Fukuda Ota Sato Kikuchi Nakano Kobayashi Nakagawa Satoh Murashita Matsushima Isshiki Goto Hashiura