BS EN ISO 10407-2:2008(2010) Petroleum and natural gas industries - Rotary drilling equipment Part 2 : Inspection and classification of used drill stem elements
2009BS EN ISO 10407-2:2009 Petroleum and natural gas industries. Rotary drilling equipment. Inspection and classification of used drill stem elements
2009BS EN ISO 10407-2:2008 Petroleum and natural gas industries - Rotary drilling equipment - Part 2: Inspection and classification of used drill stem elements (ISO 10407-2:2008)