Links
- DIN
http://www.din.de/cmd?level=tpl-home&contextid=din - KRV
Kunststoffrohrverband (Plastic Pipe Industrial Association)
http://www.krv.de/home/links.html - Notification portal for winding drum pick-up by Willen Logistics GmbH
http://www.willen.biz/metall-trommeln/trommelfreimeldung/trommelfreimeldung.html