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| 直视式存储管 | |||
| 直观存储管 | |||
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| 直观存储显像管 | |||
| 直观存储管 | |||
| 直观存储器 | |||
| direct view storage tube: 2 phrases in 2 subjects |
| Electronics | 1 |
| Technology | 1 |
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