This is Volgograd, once known as Stalingrad, a city where history is never far away. Eighty-two years after the key battle during World War II, Volgograd still bears witness to the fierce clash ...

Chuck Hull发明的首台光固化3D打印机，改型为SLA-250. 1990年，3D Systems从UVP公司购回了US4575330A专利。Chuck Hull意识到他的技术概念不仅仅限于液体，在重新提交的专利中，特别强调了任何“能够固化的材料”或“能够改变其物理状态的材料”都可以实现SLA技术。