鍛造Ⅰ

[205] Change in Lubrication Condition During Ball Penetration Test at Multiple Stages

*神谷 幸里¹、牧野 武彦²、淺井 一仁³、北村 憲彦⁴ (1. 名工大・院、2. 名工大、3. 豊田高専、4. 名工大)