equivalent key等效键equivalentadj.等价的 相等的n.相等物equivalent low-pass filter等效低通滤波器Equivalent lead conic spiral等导程圆锥螺旋线equivalent modulation degree等效调制度equivalent slenderness ratio换算长细比equivalent - year - cost等效年值equivalent simplified method等效简化方法equivalent charging pressure等效排烃压力equivalent form of commodity商品的等价形式equivalent value compression同值压缩equivalent veiling luminance等效罩纱亮度