K&E Slide Rule Manual Supplement N 4083 Log Log Duplex vector 1938
£6.75
Slide charts
Slide Chart Air Hydraulics Co Pump Pressure Diameter pipe area velocity time gal
£7.50
K&E Slide Rule Manual N 4081 Log Log Duplex Decitrig Keuffel & Esser Book 1947
£18.75
1951 Slide Chart Fastening Selector Rivet Cotter Pin Washer Nut Screw Perrygraf
£8.78
Anderson Electric ACSR & ALUMINUM CHARACTERISTICS CLAMP SELECTION SLIDE CHART
£3.83