Factors From Differential Elements to Finite Areas
B-60: Element on strip on exterior surface of inner coaxial cylinder to annular end enclosing space between cylinders.
Reference: Leuenberger and Person, 1956>
Definitions: Z=z/r1; R=r2/r1; C=Z2+R2+1
NOTE: In some cases, the argument of the cos-1 terms may be greater than abs(1), giving erroneous results.
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