Report copyright - Prof. Shilpa Patra C6T Dihedral Group · 2020. 10. 5. · R 180 270 R 270 Igo AD b 2qo R H AD H 90 180 2-70 180 90 2qo eve,h RH 180 R 90 exa 270 l) Rqo Bc Be Il) D f) belfan P l")
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