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Diagram 3 consists of several equilateral triangles of equal size.
图3是由同样大小的等边三角形所组成的。
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Butterfly Mechanism consists of two congruent equilateral triangles.
蝶形单元是由两个全等的三角形组成。
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Butterfly Mechanism consists of two congruent equilateral triangles.
蝶形单元是由两个全等的三角形组成。
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