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os triangulare; os triguetrum; pyramidaal |
pyramidal : 54 phrases in 11 subjects |
Agriculture | 1 |
Chemistry | 2 |
Coal | 1 |
Communications | 2 |
Finances | 1 |
Forestry | 2 |
General | 9 |
Law | 2 |
Medical | 30 |
Microsoft | 2 |
Natural resourses and wildlife conservation | 2 |