Subsea wellhead equipment 

 -  Armco Steel, National Supply Division 
<br/><br/><label>Subjects--Topical Terms: </label><br/>DRILL HOLE<br/>CONDUCTOR PIPE<br/>PETROLEUM<br/>PETROLEO<br/>PERFORACIONES PETROLERAS
<br/><br/><label>Universal Decimal Class. No.: </label>622.323 SU16