Hyperbolic Match Output
Model:No. 6171 PAT 129 Jiangshi Type B. Designed by Jiang Dequ 1940
Scales Front:||LL1, CU, (T)&(T) || B,S&S,SH,CI,C || D, LL2, LL3
Scales Back:||LL1, L, CT || B, CS, TH, C || D, LL2, LL3 ||
Gauge Marks: The marks p , and ' and " are on scales C and D.
Construction: 25 cm.; Photo plastic face on wood; Cursor is framed. Is not duplex; no scales or cursor on back side.
Source: R.H. and WKR and PVM
Information: Note: There are a number of various gauge marks, scale markings, and auxillary small scales used to calculate hyperbolic functions and other unknown values. See 40.