How to quickly distinguish true and false 304 stainless steel

How to quickly distinguish true and false 304 stainless steel
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How to quickly identify real and fake 304 stainless steel, and use mobile phone chargers to easily identify fake 304 stainless steel [I love electrical appliance repair]
#StainlessSteel#304StainlessSteel#IdentifyStainless Steel#304

[@to90005]

那是外表,裏面才是304.

[@hoichiuwong2523]

👍👍👍

[@user-of8wl4qp5p]

316呢？