Cross References: ISO 9227 ISO 23269-1 EN 136:1998 EN 137:2006 EN 469:2005 EN 837-1:1996 EN 13274-2:2001 EN 13274-3:2001 EN 13274-4:2001 ISO 22488 EN 12021:1998 EN 132:1990 EN 134:1990 EN 136:1998 EN 137
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