Channel: Akiyuki Brick Channel
Category: Science & Technology
Tags: lego (interest)great ball contraptionテクニックtechniclegoボールgbc玉レゴピタゴラ
Description: A Lego Great Ball Contraption (GBC) module. Driven by one PF XL motor. Building time : 70 hours. legokarakuri.blog91.fc2.com/blog-entry-66.html