Bridges 在线电子书 图书标签:
发表于2024-11-27
Bridges 在线电子书 pdf 下载 txt下载 epub 下载 mobi 下载 2024
Kids design and build bridges using arches, triangles (trestle), cantilevers, suspension, and counter balances. They make decisions about bridge style, site, cost, safety, and materials -- then test their structures for load and explore the frontier of bridge design and construction.
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Bridges 在线电子书 pdf 下载 txt下载 epub 下载 mobi 下载 2024