מצגת הסבר
תקן ריתוך
https://cad.onshape.com/documents/f6dc5a7ab4bd8dcd6217ba88/v/7ab07f2f2d6f7291dc386c90/e/eb723602a2910ff180344807
https://cad.onshape.com/documents/4d1e11aaa3728e4140753327/v/6fce43854572504287864f1c/e/24552dcb22a189d765aa6993