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Garbage processing is an important content in environment protection.Garbage crusher plays a key role in garbage processing. To enhance design rapidity and quality of garbage crusher, a new garbage crusher variant design methodology based on parameterization is proposed. The principle of variant design based on parameterization is introducted. Parametric model of garbage crusher is established and analyzed. A new product information model is established according to the mating relationship type among constituent parts of assembly. The product information model included several sub-models. It can be droved by parametric dimension, which is defined by customers’ requirement to get customized product’s design scheme. Garbage crusher variant design plug-ins based on SolidWorks is developed with VC++. The garbage crusher’s variant design is implemented.

The material composition and properties of a broken bolt were examined，and failure analysis was also made for the bolt after careful examination.

Petrochemical industry produces long-lasting industrial waste gas, waste water and waste residues which affect ecological environment in our country seriously. The eco-efficiency rate is a significant indicator in evaluation industrial sustainable development, which represents the efficiency of alleviation pressure on the environment using natural resources in the economic growth. In this paper, we used three-stage DEA model to evaluate the eco-efficiency of the petrochemical industry. The empirical analysis shows that it is feasible to use the three-stage DEA model on evaluation the eco-efficiency of the petrochemical industry. The conclusion is has a practical and theoretical significance to promote sustainable development level of petroleum enterprise.