Wing feather with copper-containing pigment, flight and display, Courtesy Peter Mullen, Ph. D.
带有铜类色素的翅羽,飞行和展示用,彼得·穆伦博士惠赠。
It is successful to re-melt deposit pure copper rotating band on D-30 shell body by using the process.
本研究探索了一种新的焊接工艺方法—熔敷扩散焊接方法,采用该方法在30口径弹体上焊接纯铜弹带取得成功。
Objective To observe the effect of supplementation of calcium, vitamin d, magnesium, zinc, and copper on bone mineral density and bone strength in rats.
目的观察在补充钙、维生素d的同时补充镁、锌、铜对大鼠骨密度和骨强度的影响。
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