... 4.certificate: ISO 9001 1. Brief introductionMH type single girder gantry crane is devided into 3 types, box ... AC , 380V , 50Hz3. Sketch4.Safety feature:Weight overload protection device, Top quality long time bearing polyurethane materials buffer, Crane ... switch, Voltage lower protection function, Emergency stop system, current overload protection system and so on! 16t single girder gantry crane