柯林斯词典astragal /ˈæstrəɡəl/ 1. N a small convex moulding, usually with a semicircular cross section 一种有半圆横截面的小凹面模型件 (Also called bead)2. N a moulding having the form of a string of beads 一串玻璃粉状的模型件 返回 astragal