To ensure that the vast majority of users call do not suffer interference and rational use of the frequency resources, national radio station management committee of frequency on the use of division, set different industry use the corresponding frequency range. Users in the purchase intercom, to the local radio management committee application frequency point. 
 station management committee of frequency on the use of division, set different industry use the corresponding frequency range. Users in the purchase intercom, to the local radio management committee application frequency point. ensure that the vast majority of users call do not suffer interference and rational use of the frequency resources, national radio station management committee of frequency on the use of division, set different industry use the corresponding frequency range. Users in the purchase intercom, to the local radio management committee application