氮肥施用方式
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The avascular necrosis model was made on left femoral head by use of liquefied nitrogen. The expression of VEGF165 gene was examined by immunohistochemical method.
采用液氮冷冻法制作狗股骨头缺血坏死模型，将细胞骨材料复合物植入缺血坏死股骨头内。
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