DIN EN ISO 20312:2012 Petroleum and natural gas industries - Design and operating limits of drill strings with aluminium alloy components (ISO 20312:2011); English version EN ISO 20312:2011
2012DIN EN ISO 20312:2012 Petroleum and natural gas industries - Design and operating limits of drill strings with aluminium alloy components (ISO 20312:2011); English version EN ISO 20312:2011