Our research found abundant diatoms in the cores both of drill CH6 in Wenzhou and of drill CH5 in Taizhou, and we set up the diatom assemblages in the Late Quaternary according to the diatom fossil of CH6, and then 12 diatom biozones were given and the paleoenvironment restored.

The diatom assemblages of intertidal region and subtidal zone have been found which consist of 3 kinds of diatoms —— marine diatom, brackish water diatom and fresh water diatom.

The diatom assemblages in surface sediment in the East China Sea have been studied systematically and 103 species and varieties of diatom are found.

Late Quaternary diatom remains from South China Sea and their geological significance Ⅳ. Diatom assemblages of Core KL91 from deep sea plain in central South China Sea;

Late Quaternary diatom remains from South China Sea and their geological significance Ⅲ. Diatom assemblages of Core KL29 from margin deep sea plain in northern South China Sea;

Late Quaternary diatom remains from South China Sea and their geological significance Ⅱ.Diatom assemblages of Core KL37 from lower continental slope in northern South China Sea;

Considering the periodicity and small travel space, a new method is developed in this paper in which a combinatory cam is used to control three points of the spherical moving body at the same time.