If it proves the subway vibration is the generator, we will move those birds far away from the subway line. It might cost a lot of money since all the devices here are specially designed in accordance with the habits of those birds. -Bian Haixia

 

If it proves the subway vibration is the generator, we will move those birds far away from the subway line. It might cost a lot of money since all the devices here are specially designed in accordance with the habits of those birds.


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