About YAMAMOTO MASAAKI
About 栗本鉄工所
About HIRAI YOSHIMASA
About 栗本鉄工所
About copper base alloy
About bismuth additive alloy
About nickel additive alloy
About alloying element
About mechanical property
About liquid filling
About molten metal
About shrinkage cavity
About machinability
About segregation(concentration distribution)
About chip(cutting)
About fluidity
About Mechanical properties
About ビスマス
About ニッケル