回复：I think need both signal wire to sync

来源: jy101 于 2012-05-05 18:51:28 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (75 bytes)
回答: I think need both signal wire to sync 由 jy101 于 2012-05-05 18:48:43

http://www.home-security-systems-answers.com/hardwired-smoke-detectors.html

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