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31. | envelope display |
| 包络显示 |
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32. | Temperature envelope |
| 温度范围 |
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33. | R.F. envelope |
| 射频脉冲宽度 |
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34. | envelope standardization |
| 信封标准化 |
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35. | Pulse envelope |
| 脉冲包络 |
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36. | gravel envelope |
| 砂砾封皮 |
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37. | floral envelope |
| 【植】花被 |
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38. | envelope protein |
| 包膜蛋白 |
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39. | electron envelope |
| 电子壳层 |
|
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40. | envelope velocity |
| 包络速度 |
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