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公共草原改良法
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公共草原改良法
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《公共草原改良法》
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Public Rangelands Improvement Act
《公共草原改良法》
1978年美国国会(United States Congress)通过立法提出的一系列草地管理方式,确立了草地放牧费计算公式,并为草原管理制定草原监测和清查程序。
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sound image control
sound in film & TV
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sound insulation and noise reduction materials
sound insulation class
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