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上海计算尺厂 1002型飛魚双面计算尺
Shanghai Slide Rule Factory Flying Fish 1002 Vector Trig

• Type: Hyperbolic Log Log Duplex
• Size: 10 Inches / 25 cm
• Material: Plastic
• Scales:
  • Front: Sh2 Sh3 K A [ B Sin2 H'2 tg2 tg3 C ] D DI lg th2
  • Back: ln1I ln2I ln3I DF [ CF CIF H2 H3 CI C ] D ln3 ln2 ln1

Similar to the model 1004, the 1002 adds three H scales for computing Pythagorean triangles and the vector calculations associated with them. H'2 is the same as the P scale on most Faber Castell rules.

CF/DF scales break at sqrt(10).

With plastic hardcase and manual in Chinese.