NF S62-111-4:2008 Fixed firefighting systems - Gas extinguishing systems - Part 4 : physical properties and system design of gas extinguishing systems for HFC 125 extinguishant.
2008NF S62-111-4:2008 Fixed firefighting systems - Gas extinguishing systems - Part 4 : physical properties and system design of gas extinguishing systems for HFC 125 extinguishant.