Dyna-Slide two-slide blank slide rule | Objects | The Collection of Historical Scientific Instruments
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Hot Sales Portable Stationery Dual Purpose Multifunctional Slide Rule - China Wholesale Slide Rule $1.02 from Jinjiang Jiaxing Import and Export co., Ltd | Globalsources.com
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Pickett Microline 140 Slide Rule With Case /lens is Slightly Fogged-rubbed/ Price Reflects Condition - Etsy
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