The blades at its periphery throw off air centrifugally in a direction following the rotation.轮周叶片将空气沿着转动方向抛离轴心.The defects of alloy steel pipe centrifugally cased are drawn. Their causes and preventives are analysed.归纳出...
Callahan posits that chemical elements radiate electromagnetic signals.卡拉汉假定化学元素放射电磁信号。Her hypothesis concerns the role of electromagnetic radiation.她的假说涉及到电磁辐射的作用.Some people are worried that electromagnetic fields from...