Hyperbolic Match Output
Maker:DING FENG (China)
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 is the mark R. On back π is on the DF scale.
Construction: 25 cm; Plastic face on laminated wood ;Cursor is not framed; Adjustable metal end brackets.