| 摘要 |
1,066,019. Making lids for pressure vessels. S.E.B. SOCIETE D'EMBOUTISSAGE DE BOURGOGNE. Feb. 8, 1966 [Feb. 24, 1965], No. 5432/66. Heading B3A. [Also in Division F2] A lid 10 is formed by stamping, rolling or machining an annular groove 2 in a metal plate, e.g. of aluminium or stainless steel, thinning, by drawing, the edge of the rim 4, and then rolling inwardly the so-thinned edge of the rim. |
