Through the rolling deformation test of 15# steel and the structure analysis of metallography and transmission electron microscope, the effect of original grain size on ferrit substructure is pointed out.

The hot deformation behavior and the microstructure evolution of a low carbon steel with different initial grain sizes are investigated by uniaxial hot compression at deformation temperatures of 700° and 600 ° and strain rates of 10 s-1 to 10-3 s-1.

Different imaging features of Ewing s sarcoma and skeletal primitive neuroectodermal tumors;

Diagnosis and treatment of supratentorial primitive neuroectodermal tumor: report of 5 cases;

Application of fluorescence in-situ hybridization and reverse transcription-polymerase chain reaction in molecular diagnosis of Ewing′s sarcoma and primitive neuroectodermal tumor;

The poetics of Lin Geng abound in rich romantic breath,originality,youth,youthful spirit,ideal and liberation are the pivotal words of his theory.

The author here attempts to interpret the true meaning of "originality" on the basis of his own interpretation of his plays, the consistency of his characters building and the unique structure of his plays, thus reveal his real ultimate concern for human destiny.

The initial states of the finished stopes are fully understood through collection and analysis of the original information on underground mining in Fujiawu mining area.

NATM s viewpoint that the self-support ability of the surrounding rock mass should be fully exerted can be further described as that the initial state of t.