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History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c38.s1.t2.13

History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c38.s1.t2.13

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v1.c38.s1.t2.13

Thus r₁ = 2.58 cms. = 1.016 inches