The detergent substitutes for normalseries products of ODS and APEO which are harmful to human environment, and has the advantages of toxic-free property and environment preservation.
该清洗剂替代了常规的危害人类环境的ODS系列产品以及APEO系列产品,具有无毒、环保的特点。
2
In this paper, based on the relation between normal subgroup and congruence, another depiction of normalseries power semigroup is given from the angles of congruence by the method of analogy.