• 

  Tokai Carbon

• 

  Ekstrom Carlson

• 

  CARR LANE MANUFACTURING CO.

• 

  General Carbide

• 

  Sgl Carbon Technic Llc

• 

  Kampen Valve Care bv

• 

  Carr Lane MANUFACTUREING

• 

  Carroll & Meynell

• 

  UniCarriers

• 

  Carlyle Johnson