Research on the Contamination Wear and Its Control of Slipper Pairs in Hydraulic Piston Pumps;

Because of contamination and special characters in physics and chemistry of seawater, at the condition with heavy load, the key pair of seawater pump come to contamination wear .

According to the invisible characteristics of the sound system, a method for the analysis of the comfort services valuation of urban sound system based on the model of pollution loss rate is proposed and applied to the assessment of the urban sound system in Dalian City.

Acid rain situation, pollution wastage and control strategy in Fujian Province;

With the quick development of Chinese marine economy,the density of maritime vessel traffic increases rapidly,and at the same time the risk of pollution caused by ships also increases,which results in mounting pressure on compensation for pollution damage.