Hyperbolic Match Output
Scales Front: || lgln1I, lgln2I, lgln3I, DF || CF, CIF, H1, H2, CI, C || D, lgln3, lgln2, lgln1|| CF is folded at √10
Scales Back: || sh1, sh2, K, A || B, sin&cos, H1 tg1&ctg1, tg2&ctg2, C || D, DI, lg, th ||
Gauge Marks: π is on A, B, C, D, and DF; π/4 is on A&B; 1° and R are on front C&D; v is on K; CF and DF are folded at √10 on right side.
Cursor Back: Has HP(**) line on right.
Construction: 25 cm.; Plastic on laminated wood; Cursor is not framed. Adjustable metal brackets.
Source: R.H. and WKR and PVM and Xu Guisheng