About MIZUGUCHI TAKASHI
About welded construction
About structural steel
About high tension steel
About low carbon steel
About arc welding
About weld zone
About annealing(heat treatment)
About metal structure(microstructure)
About cementite
About toughness
About phase transformation
About tempering
About steel structure
About high tensile strength steel plate
About SM490
About post-welding heat treatment
About microstructure
About austenitisation
About absorbed energy
About Weld zone
About Transformation structures,work structures
About Mechanical properties
About SM490
About アーク
About 溶接部
About 溶接後熱処理