Portable mathematical probability demonstrator
A demonstrator, portable technology, applied in the field of mathematics, can solve problems such as teachers' difficulty in explaining, inability to install multimedia, etc., and achieve the effect of easy understanding, easy replacement, and convenient use
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[0031] A portable mathematical probability demonstrator, comprising a base plate 1, a motor 2 is arranged at the center of the top surface of the base plate 1, the output shaft of the motor 2 is connected to the bottom of a vertically arranged rotating rod 3, and the rotating rod The top of 3 is fixedly connected with the central position of the bottom of rotating cylinder 4, and the bottom of described rotating cylinder 4 is provided with several vertically arranged telescopic rods 34, and the bottom of described telescopic rods 34 is equipped with universal wheels 35. Nine lightweight hollow balls 5 are arranged in the drum 4, and numbers 1 to 9 are marked on the hollow balls 5 in turn, and an inverted "U"-shaped placement plate 6 is arranged above the drum 4, and the Base plate 1 and the bottom corresponding position of placing plate 6 offer first slot 7, the bottom of described placing plate 6 can enter in the first slot 7, and the top central position of described drum 4 o...
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