| 单词 | triad axis |
| 释义 | > as lemmastriad axis i. Crystallography. triad axis, an axis of trigonal symmetry. ΘΚΠ the world > matter > chemistry > crystallography (general) > crystal (general) > crystal symmetry > [noun] > axis of symmetry > types of screw axis1843 twin-axis1855 triad axis1909 1909 in Cent. Dict. Suppl. < as lemmas |
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