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黑龙江
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黑龙江
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理学
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Heilong Jiang
黑龙江
亚洲大河。为国际河流。
理学
黑龙江
释
Heilong Jiang
黑龙江
中国与俄罗斯的界河。
理学
黑龙江
释
Heilong Jiang
黑龙江
中国清代东北政区。
Astronomy
Heilongjiang
黑龙江
随便看
frequency hysteresis
frequency indicator
frequency instability
frequency interval
frequency inversion
frequency jitter
frequency judge approach
frequency jumping
frequency locking
frequency-locking
frequency matching
frequency measurement
frequency measuring equipment
frequency meter
frequency meter, frequency counter
frequency method
frequency mixing
frequency-modulated cyclotron
frequency modulated oscillator
frequency modulated wave
frequency modulation
frequency modulation and control
frequency modulation and demodulation
frequency modulation, FM
frequency modulation laser
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