patent classification service 专利分类号服务

protection and classification service 文件保护和分类处

selected classification service [专利] 专利选类服务

Compensation and Classification Service 报酬和叙级处

Classification and Policy Service 分类和策略服务

classification yard service 编组场业务

api engine service classification 美国石油协会发动机使用分类

classification of service condition 使用条件级别