This article narrates the requirements of the performance of piston material as well as a preparation plan on carbon fiber aluminum-based compound materials for piston, and discusses the potential questions and specific steps in the testing process, thus provides a new approach to the preparation for piston material.

The article comprehensively and systematically introduces the development situation of piston materials for internal combustion and points out that from the long-term development strategy,low-cost and high-performance compound materials will be the major ones.

Biocompatibility of polyurethane-BaFe_(12)O_(19) composite microsphere as a new endovascular embolization material;

Using scanning electron microscope and transmission electron microscope to observe the ultrastructural features of the specimens of intracranial AVMs after endovascular embolization treatment with three kinds of embolization materials, i.

Comparison of the nasal mucous membrane effects of three kinds of packing stuffs used in nasal septum deviation corrective operations;

Comparison of the effect of nasal septum deviation corrective operation with three kinds of packing stuffs;

Methods In vitro, the viscosity and precipitation time of the Eudragit mixture at various concentrations were measured to find the best proportion of the embolic agent.