In this paper we introduce special morphisms on difference sets and we prove that the quotient of the equivalence classes defined by special morphisms is a difference set.

Reliability study of φ98 mm(4英寸) special casing packing;

The Summary of the Special Medical Records to Enhance the Value of Medical Records;

The operation model of practice testing the nature of truth about knowledge means the operation way that people will adopt in practice for testing the nature of truth about knowledge, including the generality of operation model and the particularity of operation model.

Ⅱ The spirally repetive development of particularity and generalization.

As the particularity of sailing career,live and work for a long time at sea brought a lot of negative factors on the mental health of the seafarers.

Exploring the regularities of administering a country must follow the rule of from generalization to specialty, namely, putting the general regularities of the other ruling parties as the basic points, and combine general rules with sp.

Approaches for analyzing and improving high-pressure descaling effects in special steel rolling;

Present Status and Development of Continuous Casting Technology for Special Steel in China;