31-01-2013 дата публикации
Номер: WO2013015638A3
Принадлежит:
The present invention relates to a teaching tool comprising: a main body (1) consisting of a square bottom plate (11), a rim (12) for enclosing the circumference of the bottom plate, and a transparent upper plate (13) spaced apart from and parallel to the bottom plate (11), wherein the main body has a sealed space separated from the outside; a plurality of partitions (13, 14, 15, 16) arranged in a vertical direction between the bottom plate (11) and the upper plate (13) so as to divide the sealed space of the main body (1) into a plurality of polygonal spaces (A, B, C, D, A'); and a fluid (W) which fills a portion of the polygonal spaces (A, B, C, D, A'). Partitions between the polygonal spaces and the polygonal spaces adjacent thereto filled with the fluid (W) have passages (P1, P2, P3, P4) for flow of the fluid (W). Thus, the fluid (W) may flow from one polygonal space to another polygonal space through the passages so as to fill the another polygonal space when the teaching tool is tilted ...
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