50.20 Proof sent to secretariat or FDIS ballot initiated: 8 weeks Oct 31, 1989
CEN
CEN/TC 77 Drainage equipment (systems, design rules, coordination)
European Norm
Mutual understanding and communication.
IN_DEVELOPMENT
prEN 128
50.20
Proof sent to secretariat or FDIS ballot initiated: 8 weeks
Oct 31, 1989