A microwave system for frost protection of fruit trees and {HEAD ~ plants} which utilizes {TAIL ~ a concentrated beam} of microwave energy radiated from a directional microwave antenna and directed toward trees, plants and fruits in danger of freezing 
utilizes
A microwave system for frost protection of fruit trees and { HEAD ~ plants } which utilizes { TAIL ~ a concentrated beam } of microwave energy radiated from a directional microwave antenna and directed toward trees , plants and fruits in danger of freezing
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