1, more than 10% of the product wear, or more than 10% deformation, it should be scrapped.
2, the products need to be used at rated load, overload use is strictly prohibited.
3, the products are not allowed to re-heating, welding, cutting and other processing.
4, This product is subject to regular inspection, any part of the occurrence of cracks, deformation and other damage should be scrapped.
5, the product warranty period 2 years or 20 million usage, at the quality warranty period if there is any problem should be of free exchange.