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