One of the wedge-shaped stones forming the curved parts of an arch or a vaulted ceiling.
拱楔块用于形成拱或穹窿的曲线部分的楔形石头中的一块
A small, circular or crescent-shaped opening in a vaulted roof.
半圆壁，弧形窗在高高的屋顶上的小的，圆的或新月形的开口
A raised ornament, such as one at the intersection of the ribs in a vaulted roof.
凸饰凸出来的装饰物，如在拱形屋顶的扇形拱交叉处的凸饰
