About NAMBA KEIZO
About 住友軽金属工業
About MATSUMOTO JIRO
About aluminum
About aluminum base alloy
About metallic material
About castings
About heat treatment
About terminology
About symbol
About physical property
About mechanical property
About chemical property
About weldability
About wrought alloy
About name
About Nonferrous metallic materials
About イナートガスアーク溶接
About アルミニウム
About 合金