Elbow parallel to top surface of cube, enters
from the left and escapes to the right. The
connecting point of an angle, Connecting
Point at angle is used when you place dimension.
Elbow 2
Elbow parallel to right surface of cube,
enters from the left and escapes to the downward.
Length of each side can be changed by moving
handle at end point
Elbow 3
Elbow parallel to left surface of cube, enters
from the right and escapes to the upward.
