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flood control of Huaihe River
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flood control of Huaihe River
Encyclopedia
工学
〔主要江河防洪〕
释
flood control of Huaihe River
淮河防洪
淮河流域地处南北气候过渡带,洪水灾害频繁。流域性大洪水,常常是干支流洪水遭遇,平原区洪涝并发。其防洪的重点是中下游广大平原区,有淮北平原、里下河、南四湖和沂沭河下游地区。这些地区保护的人口多达4000万~5000万人,保护的农田都在270万~350万公顷。
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electron-nuclear double resonance (ENDOR)
electron-nuclear double resonance ) ENDOR
electron-nucleon deep inelastic scattering
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electronographic camera
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