UNE-EN ISO 14693:2003 Petroleum and natural gas industries - Drilling and well-servicing equipment (ISO 14693:2003) (Endorsed by AENOR in March of 2004.)
2004UNE-EN ISO 14693:2003 Petroleum and natural gas industries - Drilling and well-servicing equipment (ISO 14693:2003) (Endorsed by AENOR in March of 2004.)