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Type | Model No. | Maker | Country | Construction Material | Date | Scale Length | Area of Use |
Linear | Blundell Harling F5100 | Blundell Harling | England | Plastic | about 1970 | 45 cm | Black Body Radiation |
Notes: "The scales on this rule are virtually identical to those on the Thornton black body radiation slide rule, but the Blundell-Harling rule is better made."
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