Keskmine GPS koordinaadid postiindeks rm13: 51.522, 0.194

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videod linnad:
>> Wennington RM13, Essex, England, GPS koordinaadid: 51.525,0.1934
>> South Hornchurch RM13, Essex, England, GPS koordinaadid: 51.525,0.1934
>> Rainham RM13, Essex, England, GPS koordinaadid: 51.5169,0.1943