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Janusz
办美国文凭加拿大文凭澳洲文凭英国文凭学位证毕业证成绩单
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Wendy Ye
BuildElectronicCircuits by Ohmify
10 days agoQuick look at Circuit Canvas - Easily draw good-looking circuits, fast
BuildElectronicCircuits by Ohmify
10 days agoQuick look at Circuit Canvas - Easily draw good-looking circuits, fast
![How to make a simple 30 second timer circuit [with capacitor + relay]](http://i.ytimg.com/vi/k-lcKDbDyPU/mqdefault.jpg "How to make a simple 30 second timer circuit [with capacitor + relay]")
