NF S62-111-9:2008 Fixed firefighting systems - Gas extinguishing - Part 9 : physical properties and system design of gas extinguishing systems for IG-55 extinguishant.
2008NF S62-111-9:2008 Fixed firefighting systems - Gas extinguishing - Part 9 : physical properties and system design of gas extinguishing systems for IG-55 extinguishant.