Purpose: To evaluate the value of the postprocessing techniques of spiral CT images in the diagnosis of non-metal foreign bodies of trachea and bronchus in children.

Objective To summarize the diagnosis and treatment methods of metallic foreign body in oral and maxillofacial deep regions.

Study on absorbability of sulfured hydrogen in several nonmetallic minerals;

As clay nonmetallic minerals possess good adsorption and ion-exchange properties,a large amount of work has been done to substitute expensive commercial active carbon with these low cost and locally available materials in water treatment.

The four kinds of nonmetallic minerals, diatomite, white clay, perlite and zeotite, which primary components being oxide of Si and Al, are of the characteristics are porous, little rigidity, bigger BET, better sparkle characteristic and so on.

Application of non-metallic minerals dusts in material processing and environmental protection

the paper combined research results discussed zeolite,bentonite,perlite,vermiculite and other minerals in the soil improvement extensive application,introduced non-metallic minerals in the soil environment protection research progress.

Phosphorus is the main element causing eutrophietion, it is important that non-metallic mineralsand industrial wastes are used in treating wastewater with phosphorus.

Application of nonmetallic minerals in preparing anti-bacterium materials;

In this paper, a new type of nonmetallic mineral storage and fresh-keeping material has been worked out, on the basis of the special physical construtions and the high degree of the chemical activities.

The application of nonmetallic mineral raw material as mineral filler to industry can improve macromolecular resin.