RE: NATURE INSPIRED INVENTIONS --- Sonar System; and I measured the depth of the sea. It was on my Mark Twain!

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josearmandor (50)in #steemstem • 6 years ago

Excellent post, very good information and writing, congratulations!

6 years ago in #steemstem by josearmandor (50)

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whileponderin (66) 6 years ago

Am glad you found this article informative @josearmandor. Thanks.

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