yuan4dDuring the past few years, some review papers give comprehensive summary of the advances in 4D printing from different viewpoints including printing material [3, 4, 8, 10],yuan4d. yuan4d. 1 comment. More to explore. More to explore. More about this Pin. 2. Saves. Pin is from. KANGTOTO. Board containing this Pin. kangtoto. 694 Pins. 3d. Related interests.