SQUARE ERG is one of the 256 characters in the Enclosed CJK Letters and Months Unicode subset.
The image below shows how the SQUARE ERG symbol looks like in some of the most complete UTF-8 fonts: Code2000, Sun-ExtA, WenQuanYi Zen Hei and GNU Unifont. If the font in which this web site is displayed does not contain the SQUARE ERG symbol, you can use the image below to get an idea of what it should look like.
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