1. Installation plane: It is required to be smooth and free of debris. At the same time, the plane error and longitudinal error of the installation surface have certain standard values, and the installation must be strictly up to the standard.

2. Rigidity of the support: When installing, read the installation instructions in detail, or operate it by professional installers.

3. Positioning problem: The positioning must be accurate to prevent future wear. If the conforming dimension is not good, it can be filled with material appropriately, but welding work on the support is prohibited.

4. Fastening bolts: Use the specified and new fastening bolts.