Usage：
1) Before each use, the operator must perform a safety inspection on the sling and use it only after being qualified;
2) The sling must be inspected regularly by professionals (trained qualified personnel) every month;
3) If it is found that the dimensional wear of the sling is greater than 5% of the original size, it must be replaced in time;
4) If it is found that the amount of dimensional deformation exceeds 3% of the original size, it must be replaced in time to ensure safety.