(subclass Fourpole Multipole) | engineering.kif 587-587 | Fourpole 是 多极 的 subclass |
(subclass Twoport Fourpole) | engineering.kif 590-590 | 双端口 是 fourpole 的 subclass |
(subclass IdealOperationalAmplifier Fourpole) | engineering.kif 604-604 | 理想运算放大器 是 fourpole 的 subclass |