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farmland shelterbelt nets
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farmland shelterbelt nets
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农学
荒漠化治理
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farmland shelterbelt nets
农田林网
农田防护林是防护林体系的主要林种之一,主要用于改善农田小气候,减轻和防御农业自然灾害,以保障农业生产稳产、高产。农田防护林由于常呈带状,又称农田防护林带,林带相互衔接组成网状,故称农田林网。
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emergency medical service, EMS
emergency medical service system
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