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| 对物觇孔; 对物觇板; 接目孔 | |||
| 觇孔〔板〕 | |||
| 照准仪; 觇板 (水准尺上的) | |||
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диоптер : 4 phrases in 2 subjects |
| Photography | 1 |
| Technology | 3 |
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