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Comparison of argon arc welding of aluminum with direct and reverse polarity direct current, as well as alternating current, using Grovers MIG-220E AC/DC as an example. Channel support - pay.cloudtips.ru/p/4d931f10 Cooperation/training in tig welding (Krasnodar) - [email protected] My social networks - https://vk.com/antonvlxx https://dzen.ru/antonvl