常見例句雙語(yǔ)例句Electromagnetic type automatic switching device for spare power source applies logic circuit of relay, which is complex and inflexible.爲(wèi)改善電磁型備用電源自投裝置接線複襍、功能僵化、誤動(dòng)等缺點(diǎn)，提出了一種新型的微機(jī)型備用電源自投裝置。 返回 electromagnetic type relay