effective lap有效搭接effectiveadj.有效的；生效的；实际的Effective coupling length等效耦合长度effective output pressure有效输出压力effective number of plate有效塔板数effective flowing section有效流动范围effectiveness coefficient有效系数effective width of flange有效翼缘宽度effective cylinder volume有效缸容积effective shunt impedance有效并联阻抗effective arrival instant有效到达时刻effective magnetic moment有效磁距