av在线一_avtt亚洲_91干网_男操女免费看_国产精品羞答答_国产三级A三级三级

3-D Printing is the additive manufacturing process of building a three-dimensional object by laying down successive layers of material. A 3-D Computer Aided Design (CAD) model of the object is converted into a series of cross-sectional slices that are sent to the 3-D printer. The process allows manufacturers to speed up development cycles

PRO6600 4K高清數字投影機

聞亭泰科4K高清投影機已經投放市場，PRO6600 4K高清投影機是PRO4000和PRO6000產品的升級產品，也是投影機進入4K超清和跨進超高清時代的標志。