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Hemmi Bamboo Slide Rule #74
The Hemmi 257 Slide Rule for Chemists and Chemical Engineers
Slide Rules: Keuffel & Esser vs. Hemmi & Post Versalog
Hemmi 153 Electrical Engineer's Slide Rule with Gudermannian Scale (1/3: Overview)
How to Use a Slide Rule: Multiplication/Division, Squaring/Square Roots
Bringing 1916 to 2016: Slide Rules
Frankenrule: the Hemmi 258ab slide rule
Sun Hemmi 74 slide rule with ASEA logo
Post Versalog vs. K+E Deci-Lon: slide rule showdown
TTT233 Hemmi Slide Rules
Hemmi 260 Layout 1/2
Sun Hemmi 30
