File:Positive polarity.jpg

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Positive_polarity.jpg(486 × 236 pixels, file size: 8 KB, MIME type: image/jpeg)

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current11:06, 25 July 2019Thumbnail for version as of 11:06, 25 July 2019486 × 236 (8 KB)Yoyojacky (talk | contribs)

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