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Bhandari, V. B. (2007), Design of machine elements (2nd ed.), Tata McGraw-Hill, p. 10, ISBN 978-0-07-061141-2. 978-0-07-061141-2
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Bhandari, V. B. (2007), Design of machine elements (2nd ed.), Tata McGraw-Hill, p. 10, ISBN 978-0-07-061141-2. 978-0-07-061141-2
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