It took a whole day for a team of technicians at London's Science Museum to assemble a life-size model of a construction crane, built according to da Vinci's 15th-century drawings.
伦敦科学博物馆的这个技术小组用了一整天才将实物大小的一个工程起重机模型组装完成，它是根据达芬奇于十五世纪所画的草图制作而成。
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