NA 109
DIN Standards Committee Petroleum and Natural Gas Industries
Standards
[CURRENT]
ISO 28781
ISO 28781
Petroleum and natural gas industries - Drilling and production equipment - Subsurface barrier valves and related equipment
Title (German)
Erdöl- und Erdgasindustrie - Bohrlochausrüstung - Untertage-Formations-Absperrventile und Zubehör