The sacral and coccygeal vertebrÃ¦ consist at an early period of life of nine separate segments which are united in the adult, so as to form two bones, five entering into the formation of the sacrum, four into that of the coccyx. Sometimes the coccyx consists of five bones; occasionally the number is reduced to three.
But a growing array of 3D printing machines has already begun to revolutionize the business of making things in the real world. 3D printers work by following a computer's digital instructions to print an object using materials such as plastic, ceramics and metal.The printing process involves building up an object one layer at a time until it's complete.ut a growing array of 3D printing machines has already begun to revolutionize the business of making things in the real world. 3D printers work by following a computer's digital instructions to print an object using materials such as plastic, ceramics and metal.
If you want to get into 3D printing, the increasingly popular option is to outsource the printing to a company like Shapeways. Once you design your print in a program like AutoDesk 123D, or find a premade one on site like Thingiverse, you simply upload your design to Shapeways and they'll take care of the printing.ere's how CNET's Rich Brown describes the process in his brief, brief overview of 3D printing: 1  Acquire a 3D model file via download, by designing a model yourself, or by scanning a physical object. 2  Send that file to the 3D printer, generally via your Windows, Mac, or Linux-based computer.