- 二(two; two horizontal strokes)
- ？(diagonal stroke indicating the number five)
A number carved between two horizontal lines resembles the ancient finger-counting method.
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pentaprism
A pentagonal prism is a type of optical instrument.
pentaprism
A pentagonal prism is a type of optical instrument.
A number carved between two horizontal lines resembles the ancient finger-counting method.
A number carved between two horizontal lines resembles the ancient finger-counting method.
pentaprism
pentaprism
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