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zi) Early 50's,Entrances Covered With Earth+Facility Was Soon Completely Forgotten~End 70's Rediscovered+20 Yrs Later Start Of Restoration
%20Early%2050's%2CEntrances%20Covered%20With%20Earth%2BFacility%20Was%20Soon%20Completely%20Forgotten~End%2070's%20Rediscovered%2B20%20Yrs%20Later%20Start%20Of%20Restoration.jpg "zi) Early 50's,Entrances Covered With Earth+Facility Was Soon Completely Forgotten~End 70's Rediscovered+20 Yrs Later Start Of Restoration.jpg")