counterpart
/ˈkauntəpɑ:t; `kaʊntɚˌpɑrt/ n
person or thing that corresponds to or has the same function as sb or sth else 相对应或具有相同功能的人或物
The sales director phoned her counterpart in the other firm, ie the other firm's sales director. 销售部的女经理给另一家公司的销售部经理打了电话.