Sign in | English | Terms of Use
DictionaryForumContacts

   English ⇄
Google | Forvo | +
backup power system
wind. 备用动力系统
backup power systems
UN, econ. 备用电力系统

 The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Add | The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Report an error | Get short URL | Language Selection Tips