The outer ring of the rolling bearing is matched with the hole of the bearing base by adopting the base hole system. What's wrong with this sentence?

The outer ring of the rolling bearing is matched with the hole of the bearing base by adopting the base hole system. What's wrong with this sentence?

The outer ring dimension of the rolling bearing is fixed in a range, and if it is necessary to change the mating property, only the dimension of the bearing seat hole can be changed, and the base shaft system shall be adopted as the benchmark.

The outer ring dimension of the rolling bearing is fixed in a range, and if it is necessary to change the mating property, only the dimension of the bearing seat hole can be changed, and the base shaft system shall be adopted as the benchmark.

Bearing as the standard parts, and it and the bearing seat with the bearing as a benchmark, should be based on the shaft system