砖和铁钉虽然都是建筑材料,听起来好象是习以为常的事,两者之间基本上没有实在的结构联系。在2005年武当山下出土了一块古砖,上面钉有古代方型开口大铁钉,却把它们联系到一起了。这是古今罕见的建筑技术。 Although bricks and nails are all building materials, it seems as if they are accustomed to things, basically no real structural connection between the two. In 2005, a piece of ancient brick unearthed in the Wudang Mountains, nailed to the ancient square-shaped open nails, but put them together. This is a rare ancient and modern building technology.