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G06G1/02—Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales
G06G1/04—Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales characterised by construction
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FR550663D1922-04-261922-04-26
Method and apparatus for graphically solving equations of the form f (x) = f1 (s) .f2 (t) .f3 (u) .f4 (v) ...
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