1, can not use objects other than steel.
2, not for the hardness of the object too high.
3, the slope of the irregular objects can not be used vertical hanging.
4, cross bite situation can not be used vertical hanging.
5, hanging crane can not hang more than 2 overlapping objects.
6, lifting objects such as sticky rust, oil, paint and other foreign objects should be wiped off and then use the lifting clamp.
7, lifting the material temperature is higher than 150 ℃ -20 ℃ can not be used.