| 发明名称 |
Lightweight structural element of varying - density |
| 摘要 |
<p>Lightweight foam structural element possesses, in addition to air-filled or similar voids, regions having different foam densities. High-density regions are preferably adjacent to surfaces and voids, and are produced by local cooling during foaming operation.</p> |
| 申请公布号 |
DE1965272(A1) |
申请公布日期 |
1971.07.15 |
| 申请号 |
DE19691965272 |
申请日期 |
1969.12.29 |
| 申请人 |
WOLFF & MUELLER |
发明人 |
HERRMANN,PETER;MAIER,HERMANN,DIPL.-ING. |
| 分类号 |
B29C33/04;B29C44/04;E04B2/02;E04C1/40;E04C2/20;E04C3/29 |
主分类号 |
B29C33/04 |
| 代理机构 |
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代理人 |
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