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,<br />

200 . G E O M E T 11.1A.<br />

jas de poleas son unos cilindros de muy poco grueso,<br />

contorno, en<br />

respecto de su anclIQ, y socavados en ~u<br />

donde tienen la forma de nna superficIe anular, cuya<br />

generatriz es un arco de círculo.<br />

Las<br />

fig. 18,<br />

pinas de

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