CFCs age calculation of shallow groundwater in Guanzhong basin

The latitudinal characteristic concentrations of CFCs have been obtained after analyzing by using gas chromatography with electronic capture detector.

Comment on modification and perfection of capital system of Chinese company;

A superficial talk about the experience and lession of construction of the Chengnan watersupply limned company in Rongxian county;

Analysing the essence of the managing mode company plus farmer household for the Deda company;