About Sun Rong
About Engineering Research Center of Rock-Soil Drilling & Excavation and Protection of Ministry of Education, China University of Geosciences(Wuhan)
About Zhao Junxian
About Jiangsu Hexin Petroleum Machinery Co., Ltd.
About Duan Longchen
About Faculty of Engineering, China University of Geosciences (Wuhan)
About Li Jingyi
About Faculty of Engineering, China University of Geosciences (Wuhan)
About Rejiagong Gongyi
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About toughness
About tensile test
About tensile strength
About flake
About impact test
About yield strength
About ferrite
About high temperature
About hardness
About hardness test
About carbide
About tempering
About sorbite
About steel
About 衝撃吸収
About high temperature tempering
About 4330V steel
About tempered sorbite
About mechanical properties
About Mechanical properties
About ミクロ組織
About 機械的性質
About 焼戻し
About 研究