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恒定亮度
| 光学高温计
| 恒定亮度 | |
| space | constant-luminance |
| 光学高温计 | |
| anim.husb. | ardometer |
| met. | leucoscope; optical pyrometer |
| refrig. | brightness temperature pyrometer |
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| constant-luminance | |||
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恒定亮度 : 3 phrases in 2 subjects |
| Metallurgy | 1 |
| Technology | 2 |
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