Get a paper and pencil and draw a box at the centerof the page.
拿出纸和笔，在纸的中心画一个盒子。
2
So the knife is now in this pencil, but now I have to get that centerof mass under under the pencil.
现在刀在铅笔里面，但我必须要把，重心移到，铅笔下面。
3
Take both material pieces, lay them out together, apply some contact cement to one end of the strap and lay it glue up in the T. Fold the T ends to the glued center to make the pencil holders.