| 摘要 |
<p>1,073,056. Making rectangular drums. AB BAHCO. April 6, 1965 [April 17, 1964], No. 14563/65. Heading B3A. In a method of making rectangular drums of sheet material, e.g. metal, blanks which are bent and joined to form the drums, are cut from a sheet of material of width corresponding to the length of the drum and comprising two or more sheets joined end-to-end, e.g. by folding or welding, thereby minimizing material wastage. Further sheets may be added when required.</p> |
