1 小时前 · Bamboo, like wood, is a natural composite material with a high strength-to-weight ratio useful for structures. [19] Bamboo's strength-to-weight ratio is similar to timber, and its …

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1 小时前 · Usborne Beginners History 10 Books Collection. Box Set (Stone Age, Iron Age, Egyptians, Ancient Greeks, Romans, Vikings, Castles & MORE!) ... 80Pcs-Present Avenue …