Objective To observe the effect of secondary trimming of newborn umbilical cords.
目的观察新生儿脐带二次修剪包扎的效果。
Determination of the Ca, Mg, Cu, Zu and Fe in the Blood Serum of Puerpera and Umbilical Cords by Atomic Absorption Spectrum Method
原子吸收光谱法测定产妇血清与脐带血清中的钙镁铜锌铁
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