DIN EN 15004-4:2020 固定消防系统. 气体灭火系统. 第4部分: HFC 125灭火剂气体灭火系统的物理特性和系统设计(ISO 14520-8-2019,修改); 德文版 EN 15004-4-2020
Fixed firefighting systems - Gas extinguishing systems - Part 4: Physical properties and system design of gas extinguishing systems for HFC 125 extinguishant (ISO 14520-8:2019, modified); German version EN 15004-4:2020