Sign in | English | Terms of Use
DictionaryForumContacts

   English ⇄
Google | Forvo | +
hard formation bit
dril. 钻硬地层钻头
oil 硬地层钻头
tech. 钻硬岩钻头

 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