Seller Dois

Tuesday, December 29, 2015

产品介绍： ．所有闪光灯都有一支石英玻璃管，在管的两端内封​​有电极 ( 阴极、阳极). ．All flashlights have a quartz glass tube, which has electrodes (cathode、 anode) sealed in each end. ．除直管外还有U 型、环型、螺旋型. ．In addition to straight tube, there are U-shaped tube、 ring tube、spiral tube. ．阴极头涂有放射物来降低电子工作性能，连结灯管时候必须注意(极性) 的安排...