Photopolymer materials;polymer compositions used in the manufacture of commercial and industrial goods;3D printers;metal and machine parts for use in industrial manufacturing and 3D printing operations;casts, trees, molds, cores, printed patterns, casting-ready components, and structures for use in 3D printing;3-D printing components;computer hardware for use in 3D printing;3D printing resins;polymer parts used in the manufacture of commercial and industrial goods;3D printing for others;manuf...