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Slide Rules at Rs 425/piece | Steel Rule Dies in Varanasi | ID: 20514947488
80 SCIENTIFIC AMERICAN MAY 2006
Slide Rule Aristo Trilog no.0908 with Case Made in Germany | eBay
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Vintage 4” LUFKIN No 014 Brass Slide Rule RARE Made In USA - GhanaCelebrities.Com
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Buy A Manual of the Slide Rule: Its History, Principle, and Operation Book Online at Low Prices in India | A Manual of the Slide Rule: Its History, Principle, and Operation Reviews
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Vintage A W Faber Castell German Slide Rule in Case 375 | eBay
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File:Vintage Frederick Post Co. No. 1441 Four Inch Slide Rule With Magnifier, Made By Hemmi In Occupied Japan (23033854602).jpg - Wikimedia Commons