====== 220-as csatlakozók ======
===== Fali aljathoz =====
  * https://en.wikipedia.org/wiki/Mains_electricity_by_country#Identification_guide
  * https://www.hifi-advice.com/blog/audiophile-insights/cables-info/schuko-connector-standards/

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===== IEC "számítógépes" csatlakozók =====
  * https://en.wikipedia.org/wiki/IEC_60320#Appliance_couplers
  * https://www.youtube.com/watch?v=C0aLMOodVsg

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