Toolbox for teaching aids in applied mathematics
A technology of applied mathematics and toolboxes, applied in teaching aids, manufacturing tools, educational tools, etc., can solve the problems that affect the efficient and full use of toolboxes, the difficulty of realizing other functions, and the single function of toolboxes, etc., so as to facilitate flat display and good observation The effect of learning and increasing storage height and storage volume
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[0030] As an embodiment of the present invention, an elastic and wear-resistant cavity layer 20 is pasted on the inner wall of the engaging transverse groove 101; The wall is provided with an expansion protruding strip 92; the elastic and wear-resistant cavity layer 20 communicates with the expansion cavity 91 through the air guide groove; when working, when the transverse engagement end of the L-shaped engagement block 5 is engaged in the engagement transverse groove 101, the lateral engaging end of the L-shaped engaging block 5 will squeeze the elastic wear-resistant cavity layer 20 in the engaging transverse groove 101, so that the gas inside the elastic wear-resistant cavity layer 20 enters through the air guide groove. In the expansion chamber 91, the expansion of the expansion chamber 91 will drive the expansion protrusion 92 on the upper end of the plug-in block 9 to be squeezed onto the inner wall of the plug-in slot 41, thereby increasing the insertion distance between...
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