对当前常用的RP工艺，如立体光刻、分层实体制造、熔融挤压成型、选区激光烧结等的原理、工艺和优缺点进行了简单评述，认为上述工艺均......

When a daughter nucleus produced by electron capture takes part in a level transition from an excited state to its groun......

无模铸型铸造工艺是将离散/堆积成形原理与树脂砂工艺有机结合,采用两次喷射成形的新概念和方法.对影响无模铸型铸造工艺成形精度......