About MORI YASUHIKO
About 日本大 生産工
About UMEDA TAKATERU
About copper base alloy
About tin additive alloy
About bismuth additive alloy
About selenium additive alloy
About silicon additive alloy
About zinc additive alloy
About castings
About notch
About tensile strength
About elongation percentage
About fatigue strength
About solidification structure
About S-N curve
About material
About mechanical property
About strength
About Lead-free material
About Mechanical properties
About 鉛フリー
About 銅合金
About 鋳物
About 動向
About 引張強さ
About 疲労強度
About 切欠き