Nine gantry crane safety rules do not hang nine do not hang: 1. Does not try hanging, not hanging. 2. Lifting super span, not hanging. 3. Non commanders command, not hanging. The signal is unknown, not hanging. 5. The right hook heavy center, not hanging. 6. The long wide was no traction rope, not hanging. 7. lasso instability, not hanging. 8. sandwiched weight, phase voltage, phase hook, not hanging. 9. hook directly linked to the article, not hanging. Phone: 15515825537 Website: http: //www.hnqzjjt.com Tel: 0371-53308519 / 53308529