Optical And electron microscopy were used to study the soldered device, where cracks were found at the sides with the SMD transformer. Cross-sectional Examination also exhibited vacant spaces throughout the cracks, i.e., that they could are already at the middle of structural weak point. 设计的规范度、细致度，直接决定产品的稳定性、寿命、量产良率�?掌握从原理图到 Think about Thermal Exp... https://www.jiadi-newmaterials.com/products/