The device of Grigori Grabovoi. The device of development of concentrations PRK – 1U.

On ggrig.com site ( ggrig.com ) updated information about the device of development of concentrations PRK – 1U. Added new photos of the device.

Also, you can see video-testifying about the results of testing of the device ( pr.grigori-grabovoi.world ) and protocols of testing of the device ( pr.grigori-grabovoi.world ).
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