crudeasbestos

By the surface features of crust,distribution of color and characteristics of fissure skeins, the paper discusses the gambling of raw jadeite and its influence to the valuatiion of raw jadeite.

翡翠原石 (赌石 )的研究一直引起业界的重视。

Five new species of Rhyachophila nigrocephala group belonging to the genus Rhyacophila, named Rhyacophila euryphylla sp.

本文记述原石蛾属Ｒｈｙａｃｏｐｈｉａ的Ｒ。