Hyperbolic Match Output
Maker:DING FENG (China)
Model:Slide Rule has no ID No. or name on it; Box has No. 5471
Scales Front: || 2D, L, K, A || Tan&Cot, Sin&Cos, H', CI, C || D, Th, Sh1, Sh2 || CF and DF are folded at √10
Scales Back: || LL1I, LL2I, LL3I, DF || CF, CIF, H, CI, C || D, LL3, LL2, LL1||
Gauge Marks: On front C scale are the marks l ° and R. On back π is on the DF scale.
Construction: 25 cm.; Plastic face on laminated wood; Cursor is framed; Adjustable metal end brackets.