电话机防盗报警器伍新民随着市话装机率的飞速发展，城乡很多住宅都拥有了私人电话。当你上班后，家里没人，往往耽心家中财产的安全。何不利用你的电活作为你的防盗卫士？不管你走到哪里，它都会及时地用电话向你报告警做下面，就向你具体介绍电路的原理及制作方法：一市... Telephone burglar alarm Wu Xinmin With the rapid development of local telephone loading rate, many homes in urban and rural areas have a private telephone. When you go to work, no one at home, often worry about the safety of the property at home. Why not use your electricity as your security guard? No matter where you go, it will promptly report to you by telephone to the police to do the following, to introduce you to the principle of the circuit and production methods: a city ...