窒化１号機

sono shell 窒化鋼/彩虹14/試作１号機 自分が求める理想の窒化レシピを求めて現在も窒化レシピを変えた新たなsonobe シェルを製造中です sono shell nitrided No.1 In pursuit of my ideal nitriding recipe, I am currently manufacturing new sono shells with different nitriding recipes.