| 摘要 |
978,132. Drilling machine details; welding; by fusion, brazing. E. D. HOUGEN. Dec. 1, 1961 [Dec. 5, 1960], No. 3741/64. Divided out of 978,131. Headings B3C and B3R. A method of separating metal panels 42, 43, spot welded at 44, to allow straightening, comprises trepanning holes 43a in panel 43, leaving portions 43b on panel 42, straightening the panel, and then re-assembling and welding or brazing the panels together at 46. |
