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文件内容
| NEMA C57.12.50 |
1981-JAN-01 已撤销
Ventilated Dry-Type Distribution Transformers, 1 to 500 kVA, Single-Phase, and 15 to 500 kVA, Three-Phase, with High-Voltage 601 to 34 500 Volts, Low-Voltage 120 to 600 Volts, Requirements for-Correction June 1982; Now Copyrighted by IEEE
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