发明授权
US5633053A Structural element with intermediate ribbing support 失效
具有中间罗纹支撑的结构元件

Structural element with intermediate ribbing support
摘要:
Structural elements of great thickness are provided by having limited extent ribbing projecting from each surface structure coupled by junctions having extents which combined with the ribbing extents bridges the distance between the surface structures of the structural elements.
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