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频率调制
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频率调制
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频率调制
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frequency modulation
频率调制
频率调制是指通过对激光器的输出频率进行调制,使得光载波频率随调制信号发生改变。
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frequency modulation
频率调制
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frequency modulation, FM
频率调制
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North American Air Defense Agreement
North American Alfalfa Improvement Conference
North American Association of Fisheries Economists
North American Broadcasters Association
North American Congress on Latin America
North American Drama Therapy Association
North America Nebula
North American Free Trade Agreement
North American Free Trade Area
North American free trade area
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North American Indian Languages
North American Nature Photography Association
north American nebula
North American shield
North America plate
north america red fox
Northampton
North and Central American hydropower resources
Northanger Abbey
North Asia
North Asia race
North Atlantic currents
North Atlantic Deep Water
North Atlantic Oscillation
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