1,Professional R&D Management 2, CE&ISO approved .3,High Safety and Precision . 4 ,Imported (FEC80 ) Chain 5 ,Lower noise . Model QD Hook Overhead Crane : Model QD Electric Double-girder Overhead Crane is widely used in mechine-processing Assembly workshop,metallurgy,casting workshop and warehouse ,etc, for loading and unloadingthe goods. The configuration grab can be used in metallurgy,cement, ...