1. Do not use objects other than steel.
2. Not used for objects with too high hardness.
3. Objects with irregular slopes may not be used for vertical lifting.
4. It is not possible to use vertical cranes in the case of horizontal bite.
5, the vertical crane can not hang more than 2 overlapping objects.
6. Lifting objects such as rust, oil, paint and other foreign objects should be wiped off before using lifting clamps.
7. It can't be used when the lifting temperature is higher than 150 °C-20 °C.