You used this functor twice for binary composition in listing4 .
在清单4中对二元合成使用这个仿函数两次。
This article analyzes the concept and significance of patent document , and also discusses how to search patent on net by classification number , retrieval functor , patent number , and at last discusses the significance of patent legal condition 's retrieval .
Aiming at the shortcomings of traditional electric operator , the paper put forward the design scheme of a new kind of electric operator by using computer technology and electronic technology , and introduced lectotype and design of each functor as well as the solution of the key questions in details .