angle of fall

• 入射角,塌落角

angle of fall的用法和样例：

例句

1. On the basis of the measured incident angle modified coefficient of the collector panels, the relation between the daily and instantaneous efficiency is given.
   在测试了该集热器阵列的入射角修正系数的基础上给出了全日效率与瞬时效率的关系。