2005DIN EN ISO 21049:2005-11 Pumps - Shaft sealing systems for centrifugal and rotary pumps (ISO 21049:2004); English version EN ISO 21049:2004 / Note: To be replaced by DIN EN ISO 21049 (2010-03).
2005DIN EN ISO 21049:2005 Pumps - Shaft sealing systems for centrifugal and rotary pumps (ISO 21049:2004); English version EN ISO 21049:2004