AH Industries ATS Wind Energy Services Aventis Wind Power Bladt Industries Danvægt Deugro Dong Energy Frank Mohn Fusa Gamesa Hansen Transmissions int. IMPSA MAN Meridian Energy MT Højgaard REpower Systems Siemens Wind Power STEELCON Technip Offshore Finland Vestas
National crane standardization group S-353 with reference to International Techinal Committee CEN/TC 147 Cranes – Safety.