DIN EN 671-3:2009 固定式消防系统.软管系统.第3部分:带半钢性软管的软管卷曲机和带扁平软管的软管设备的维修.英文版本DIN EN 671-3-2009-07
Fixed firefighting systems - Hose systems - Part 3: Maintenance of hose reels with semi-rigid hose and hose systems with lay-flat hose; English version of DIN EN 671-3:2009-07