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林木发育期观测
释义
林木发育期观测
Encyclopedia
农学
林木发育期观测
释
observation of developmental stages of trees
林木发育期观测
在地形、土壤、栽培水平一致的地段上,选取年龄长势相近、生长健壮的主要树木种类和品种,依据树木外部形态特征,按发育期出现顺序对各发育期出现日期进行观测和记录的活动。
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frequency conversion circuit
frequency conversion technique
frequency conversion transformation of fan and water pump
frequency converter
frequency counter
frequency criterion
frequency curve
frequency cutoff
frequency dependence selection
frequency-dependent conductivity
frequency deviation
frequency diagram
frequency dictionary
frequency difference splitting technique
frequency discriminator
frequency dispersion
frequency distribution
frequency distribution curve
frequency distribution table
frequency diversity and combining
frequency divider
frequency dividing network
frequency division duplex-long term evolution, FDD-LTE
frequency division multiple access
frequency division multiple access, FDMA
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