Device for learning rolling angles of ball used in the game of pool

摘要

the utility model is shown in figure teaching tool angles were used in the rolling billiard games, consisting of the board which is the basis on which is a protractor and the design of the two bullets, one of which is affixed to the grid in a way to turn around its own axis and tangentially to the first rotates together with the first in space.in addition to the sphere attached to the grid is the arrow allowing setting angles.