About this 3D model

Some parts for mountint the printrbot exturder on Y-Z axies base , so that you can make the nozzle not so heavy . 一组用来将printrbot extruder 装在 Y-Zè½´åŸºä¸Šçš„ï¼Œè¿™æ ·å–·å˜´éƒ¨ä½å¯ä»¥ä½¿ç”¨ä½¿ç”¨bowden系列的喷嘴，从而减轻喷嘴重量