设(R)σ是指所有σ-幂零群所有构成的群类,并记G(R)σ 是G的σ-幂零群上根.我们称群G是σ-超可解的,如果G的含于G(R)σ的主因子是循环的.群G的子群H称为与子群T是完全c-置换的,如果存在元素x∈满足HTx=Tx H.利用子群的完全c-置换性研究两个σ-超可解群的积所构成的有限群的结构.“,”Let (R)σdenote the classes of all σ-nilpotent groups and G(R)σbe theσ-nilpotent residual of G .We say that G isσ-supersoluble if each chief factor of G below G(R)σis cyclic .A subgroup H of G is said to be completely c-permutable with a subgroup T of G if there exists an element x ∈ such that HTx = Tx H .The structure of finite group which is the product of two σ-supersoluble subgroups was studied by means of the completely c-permutability of subgroups .