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1. Macrocell corrosion of X70 steel in soils was studied by using weight loss and electrochemical impedance spectroscopy (EIS).

2. Salt concentration difference macrocell corrosion of X70 steel in yellow pebble soil was studied by means of EIS and weight loss method.

3. When X70 steel formed a macrocell between inoculation SRB or bactericide clay and sand, X70 steel in clay was an anode, while that in sand was a cathode.

4. The coefficient of the macrocell corrosion effect, was proposed for calculation of the effect intensity of macrocell.

5. The galvanic current distribution of macrocell is in good agreement with the images of corrosion potential.

6. The relationship of the corrosion rate of steel and the resistance of concrete was studied to characterize the macrocell corrosion of reinforcement in the concrete containing chloride.

7. A changeable resistance was linked in series between the anion and cathode of the macrocell to simulate the change of the concrete resistance.

8. Some indoor simulation testing methods were used to study the behavior and mechanism of macrocell corrosion in soil. Serious macrocell corrosion of metals was found.

9. The thesis mainly describes the design and implementation of the SWR and power online-monitoring system for the Antenna and Feeder in the mobile macrocell Base station.

10. The embodiment of the invention discloses a method for distributing downlink dynamic resources in a hybrid network of a macrocell and a femtocell.