About Gao Yunfang
About Xingtai Polytechnic College
About Zeng Xianjun
About Xingtai Polytechnic College
About Yao Jianhui
About Xingtai Polytechnic College
About Rejiagong Gongyi
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About hardening(heat treatment)
About austenite
About testing device
About steel
About low temperature
About micro structure
About carbide
About scanning electron microscope
About martensite
About tempering
About 抵抗炉
About tool steel
About low temperature tempering
About carbide
About Transformation structures,work structures
About Mechanical properties
About 炭化物
About 析出
About 挙動
About 焼戻し
About 研究