π型滤波器: pi type filterπ型网络: pi network等效π型网络: pi network equivalentπ烯丙型络合机理: allyl complex mechanismπ网络: pi networkπ形节: pi section; pi-section; π sectionπ图: pi diagramπ形滤波器: pi filter; pi type filterπ模振荡: pi mode oscillationπ形衰减器: pia attenuatorπ模态: pi mode
