| 摘要 |
PURPOSE: A resin net structure is provided to have excellent durability by placing an intermediate rib in a double structure and to keep water stopping and draining layers by enhancing retentive force against continuous pressure. CONSTITUTION: The resin net structure is formed by piling up a primary rib(61), a secondary rib(62) and an intermediate rib(63) by turns to form each intersecting point(60).
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