讨论了环由子集生成的子环、子环的和与积的结构,子环的积对和的分配关系,证明了结合环类是完备代数类及可积代数类,从而是完备代数正规类及可积代数正规类.
The structures of the subring generated by a subset of a ring, the structures of sum and product of subrings, the distribution product over the sum of subrings are discovered, it is showen that the class of associative rings is a class of complete algebras and a class of product algebras, so it is a normal class of complete algebras and a normal class of product algebras.