angleangle two triangles are similar if a pair of corresponding angles are equal. 角角若两角对应相等则两三角形相似。
the influence upon horizontal angles brought forth by electricity of surrey station and observing point and the corresponding remedies 测站和照准点偏心对水平角测量的影响及消除减弱措施
furthermore， the regulating angles of straighten roll corresponding to the steel pipes of different specification have been calculated. 计算出了各种钢管对应的矫直辊调整角度。