pdc concave drill bit for coal mine

• Post Date:

  Mar 25,2013

• Expiry Date:

  Mar 25,2014

• Detailed Description:

  
  

• Company:

  zhengzhou ld diamond products co.,ltd     [ China ]        

• Contact:

  amy

• Tel:

  +86-0371-60835862

• Fax:

  +86-0371-60835788

• Email:

  amy@ld-diamond.com