请问以下科室英文名称怎么翻译啊？谢谢！

董事长室Chairman office
副总经理室Vice General Manager Office
账务总监室Financial Controller Office
法律事务室Legal Affairs Office
成本管理部Cost Management Office
洽谈室Meeting Room

Chairman's Office = 董事长室
Deputy General Manager's Office = 副总经理室
Financial Controller's Office = 账务总监室
Legal Affairs Office = 法律事务室
Department of Cost Management = 成本管理部
Meeting Room = 洽谈室

board chairman room

general manager room

accountant majordomo

law affair room

cost manage office

chatting room