| 摘要 |
PURPOSE: Round pyramid is provided wherein upper and lower side are structured in round or oval form to generate energy so that it is easily produced and placed without being limited to space. CONSTITUTION: The round pyramid is characterized by making slide angle of a lateral face(3) which connects a bottom side(1) and an upper side(2) formed in the range of 25-65degree wherein the bottom and the upper side are formed in round, oval and hemispherical form, the diameter of the bottom side is larger than that of the upper side and an insertion part and an insertion groove are formed and combined at one side of a connection part(4).
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