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vegetative period
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vegetative period
Encyclopedia
农学
﹝经济林生长发育规律﹞
释
vegetative period
幼树期
经济林从苗木定植到有经济产量所经历的时期。这一时期的树种以营养生长为主。又称营养生长期。
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safety habits
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safety in railway signaling
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safety inspection of pipeline project
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safety integrity level of safety instrumented system
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safety in the petroleum and petrochemical industry
safety inventory
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safety investment decision-making techniques
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