The Encyclopedia Americana: A Library of Universal Knowledge, Količina 8Americana corporation, 1931 |
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Zadetki 1–3 od 31
Stran 325
... curves . A Among these special curves , one of the most important divisions is that of roulettes . roulette is traced by a point attached to a curve , which itself rolls without sliding on a fixed curve . A point on the circumference of ...
... curves . A Among these special curves , one of the most important divisions is that of roulettes . roulette is traced by a point attached to a curve , which itself rolls without sliding on a fixed curve . A point on the circumference of ...
Stran 326
... curve . It is known that not every curve in space is the complete intersection of two surfaces , and therefore ( 1 ) and ( 2 ) are not always equiva- lent forms . In fact , when the three equations ( 2 ) , defining a curve , are ...
... curve . It is known that not every curve in space is the complete intersection of two surfaces , and therefore ( 1 ) and ( 2 ) are not always equiva- lent forms . In fact , when the three equations ( 2 ) , defining a curve , are ...
Stran 330
... curves on cylindrical surfaces that intersect all the right - line generators of the sur- face under a constant angle . Such a curve is a general helix . When , however , both curva- ture and torsion are constant , the curve becomes the ...
... curves on cylindrical surfaces that intersect all the right - line generators of the sur- face under a constant angle . Such a curve is a general helix . When , however , both curva- ture and torsion are constant , the curve becomes the ...
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