Sign in | English | Terms of Use
DictionaryForumContacts

   Chinese ⇄
Google | Forvo | +
自由振荡周期
el. natural period
oil free period
tech. free oscillation period

 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