Concise Ruler Circular Ruler 300 100829
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The Slide Rule
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Midori CL Slide Ruler Clear (42260006)
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Slide Rules: Design, Build, and Archive Presentations in the Engineering and Technical Fields
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SuperCool Slide Rule by SuperCool Slide Rule
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General Tools 300/1 6-Inch Flex Precision Stainless Steel Ruler, Chrome
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24x36 gallery poster, slide rule
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PENKOHOME 12 Inch Slide Ruler for Mathematics,2 Pack Multifunctional Drawing Rolling Ruler Parallel Rolling Ruler Balancing Scale for Students, Artists, Architects, Engineers
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Classically Trained Slide Rule Mechanical Analog Calculator T-Shirt
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The Pocket Engineer - Wallet Engineering Ruler Scale and Unit Conversion Reference 3 inch
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