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流量密度关系
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流量密度关系
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flow-density relation
流量密度关系
流量与密度呈现抛物线关系,当密度为零,流量为零,密度逐渐增大到最佳密度,则流量增加到最大流量,随后密度逐渐增大,流量逐渐减小,密度达到阻塞密度时,流量为零。
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Porta
portability
portable
portable absolute gravimeter
portable analog instrument
portable broadband seismograph
portable chromatograph
portable circuit checker
portable computer
portable darkroom
portable differential optical absorption spectrometer
portable energy dispersive X-ray fluorescence analyzer
portable fire extinguisher
Portable gamma-ray spectrometer
portable gamma spectrometer
portable gas alarm
portable hydrological logging meter
portable in situ fluorescence fast detector of water algae
portable life support system
portable media player
portable meridian circle
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