Process and apparatus for the production of parts from ductile materials with integral stiffeners on one or both sides |
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申请号 | US3521472D | 申请日 | 1967-02-03 | 公开(公告)号 | US3521472A | 公开(公告)日 | 1970-07-21 |
申请人 | BRINGEWALD PROCESS CORP; | 发明人 | BRINGEWALD AUGUST R; | ||||
摘要 | |||||||
权利要求 | |||||||
说明书全文 |