angle change短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 un.角变位 The method of angle difference testing is used to measure the topography of large flat mirror, the topography would be evaluated by measuring angle change of normal every point on the mirror. 利用角差法原理设计了一种集高精度测角仪与五棱镜于一体的面形检测系统，实现了大口径平面镜不同姿态下的面形测试。 www.mct.com.cn