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This part can freely sliding horizontally through the Sliding Ruler, and it can 90 degree free rotation, can be fixed by the circular rotating button The triangle ruler can move freely horizontally along the guide rail of the ruler. Sliding T-square Ruler can move up and down freely along the guide rails on both sides of the drawing board. When moving to the desired position, the locking devices on both sides can be used to achieve fixation support legs can play the role of holding up the drawing board at an angle. It has a buckle design, which is stable and will not shake, making drawing more convenient and in line with people's habits. The small button on the edge controls the opening and closing of the left and bottom, which is convenient for inserting paper







