標題: ASTM D 3380-1990 塑料基微波電路底板的相對介電常數(介電常... [打印本頁] 作者: 兌水 時間: 2009-10-5 10:04 標題: ASTM D 3380-1990 塑料基微波電路底板的相對介電常數(介電常... D3380-90(2003) Standard Test Method for Relative Permittivity (Dielectric Constant) and Dissipation Factor of Polymer-Based Microwave Circuit Substrates