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並前往https://www.traffic.org/site/assets/files/4102/identification_ivory_substitues_guide.pdf

Identification Guide for Ivory and Ivory Substitutes (Scanned ...

A tusk consists of a root and the tusk proper. Teeth and tusks (Fig. 8) have the same physical structures: pulp cavity, dentine, cementum and enamel. The ...

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