用于3D打印机的框架
框架组装： https://www.youtube.com/watch?t=93&v=9lqsslsYwdA http://martin53.wixsite.com/3d-printer-x-project/diy
部分内容： http://www.ebay.com/itm/3D-Printer-Smooth-Threaded-Rods-Nuts-Washers-for-Prusa-i3-i3-Rework-M8-M10/321896729591
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