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| collimator; tube diaphragm | |||
| collimator tube | |||
| collimating device | |||
| collimating element | |||
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平行光 管 : 15 phrases in 5 subjects |
| Agriculture | 1 |
| Electronics | 3 |
| Metallurgy | 1 |
| Space | 1 |
| Technology | 9 |
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