老祖宗的“木构黑科技”！不用一颗钉，稳了上千年

Mortise-and-tenon joints are a traditional Chinese technique for joining wooden structures, used in buildings, bridges, furniture, and window frames.

榫卯结构是中国传统的木结构连接工艺，广泛应用于建筑、桥梁、家具、窗框等各类木结构中。

A tenon is a small projection on one piece of wood that fits into a corresponding mortise—a recess, not a hole—in another piece, locking the two securely together.

榫是一块木材上突出的小部分，能嵌入另一块木材上对应的卯（凹槽）中，使两块木材牢固咬合。

Known in Chinese as "sunmao," mortise-and-tenon joints were the standard joining technique across China until the late 19th century, when mass-produced nails became widely available.

这种被称为“榫卯”的连接工艺，在19世纪末批量生产的钉子普及之前，一直是中国各地通用的标准连接方式。