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Related Objects


Pickett teaching-size slide rule

Keuffel & Esser model 1740 Thacher slide rule

Kreisrechenscheiber KRS 40 slide rule

Sun Hemmi slide-rule

ALCO Personal Calculator

Pickett Microline 140

Pickett Model N-500-T

Unbranded Slide Rule.

Sun Hemmi/Geotec Model 341

Sun Hemmi/Geotec Model 341

Faber Castell 2/83 Novo Duplex

Pickett Model 1010-T

Pickett Model 1010-ES Trig slide rule

Keuffel & Esser Co. Slide Rule

Sterling Slide Rule

Slide rule with a missing slider

The Slide Rule by R.G. Blaine

Frederick Post Co. Slide Rule - Model 1444K Made in Japan

Relay Bamboo Slide rule no.105

K&E Bamboo Slide Rule - Model 4018-3


Electronic Ruler

Faber-Castell 67/54 Slide Rule

Pickett Model N 3-ES Slide Rule
An Improved Transmission Line Calculator
An Improved Transmission Line Calculator

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