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Please Subscribe & Comment -Doyle Engineering Vibro Post Driver Installing Piles on Solar Farm in USA Ideal for Foundation Fencing Contractors installing Guide Rails,Crash Barriers for Motorways This is some background information to the Philadelphia Solar Farm http://www.youtube.com/watch?v=UBTLPOmqM0Q Contact: Denis Doyle, Heath Farm,Athy,Co.Kildare,Ireland,Europe. www.ddoyleeng.com doyle7700@gmail.com www.youtube.com/doyle7700