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林木良种推广
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林木良种推广
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农学
林木新品种
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promotion of improved forest varieties
林木良种推广
在一定区域内,把通过审定且产量、适应性、抗性等方面明显优于当前主栽材料和种植材料的林木种子进行推广的活动。
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urban finance
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urban forest planning and design
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urban function and type of urban function in China
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urban gas supply firm
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urban geographical information system
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