this is the old system of the board of a certain angle with the angle of the fixed because of the various problems appeared, in order to solve the security of the system is not in the table, the body to be fixed on the coupling shaft of the carrier board. the degree of coupling and the effect of the control board, the combination of the position of the bracket and the base frame, in the form of a shoe to control the position of multiple use, easy to control the angle of the drawing board can be combined with the support body. the height of the bracket to be adjusted to the nuts and a method for the control of the board of control. the system can be used with the user's physical condition and used according to the angle of the back board and the height. a temple to be able to use the system of the board of the angle control device is provided.
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