compact_strip_feeding_line gripper feed AVP with electric valve Coilverarbeitung heavy load universal transport cart type 2 Maintenance die manipulator hydraulic gripper feed AVP pallet_transport_carts_type_1 Handlingsysteme strip_feeding_lines Handlingsysteme conventional lines for coil feeding Overhead Transport Systems Schwerlasthandling pneumatic gripper feed AVP Werkzeugwechsel