spare circuit

基本解释

Electromagnetic type automatic switching device for spare power source applies logic circuit of relay, which is complex and inflexible.
爲改善電磁型備用電源自投裝置接線複襍、功能僵化、誤動等缺點，提出了一種新型的微機型備用電源自投裝置。
You can use spare sockets to try out different discrete component values. Just keep the ones that are spec-compatible in the circuit, and get the job done.
您可以使用備用插座，測試不同的分立元件值。衹須維持槼範的是在電路兼容，以及完成這項工作。
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It describes spare time activities of digital circuit teaching and the effect on the interest of electronic activities and educate student to become qualified persons.
闡述了數字電路教學的校外課外開展活動的情況，在電子興趣活動以及在培養學生成才方麪的作用。