短語詞組短語entrance ray angle 入射光線角entrance circular angle 入口圓角entrance shrinking angle 入口收縮角entrance blade angle 葉片進口角blade entrance angle 葉片進口角R entrance angle 人射角horizontal entrance angle 水平入射角尹furcation entrance angle 分叉入口角entrance half -angle 入射半角 返回 entrance angle