Analysis and discuss from three type of typical fracture indicate that the abnormal microstructure and surface defect of the wire rod are the main cause of leading to nature fracture.

The coastal vulnerability includes natural vulnerability and socioeconomic vulnerability.

From property rights prospective to analysis the stocksystem reform of the natural monopoly industry——take the railway industry for example;

The influence of indivisibility and divisibility on natural monopoly in network industries;

Natural monopoly trends in the optimization process of organizational structure of circulation industry;

First discusses the causes for natural monopolization in natural gas industry,and further analyzes the gas market features and its pricing mechanism under the conditions of natural monopolization.

However,it is not the one that the governments usually apply to conduct how the manufacturers act extrinsically when coming to the period of natural monopolization,but the one that controls and regulates the incumbent manufactures to make them display the features of natural monopolies in terms of price,product and service quality.

The fault block zone may be separated into fault block group and natural fault block according to the characteristics of the fault and the distribution of the stratigraphic fluid.