Scales Feasible Calculations No. 27N
(No. 28N)
No. 270N No. 300 No. 480 Stadia
Professional
 C, D  general multiplication / division,
 mingle multiplication / division
Yes Yes Yes Yes Yes
 C, CI, D  continuous multiplication,
 continuous division
Yes Yes Yes Yes Yes
 C, D  direct proportion Yes Yes Yes Yes Yes
 CI, D  inverse proportion Yes Yes Yes Yes --
 A, B, C, D  square root and related
 multiplication / division
Yes Yes Yes Yes --
 K, C, D  cube root and related
 multiplication / division
Yes Yes Yes Yes --
 L, C  logarithm -- Yes Yes Yes --
 LL2 , LL3 , C  descending series -- -- Yes -- --
 D, DI, S, T, ST  trigonometric function -- Yes Yes -- Yes
 D, C, C'  difference in height,
 horizontal distance
-- -- -- -- Yes
  • The CONCISE Circular Slide Rule is developed to make full use of its features according to each model. We recommend our customers to examine the specifications carefully before purchase.
  • Please also note the No. 28N is especially designed for standard English use.
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