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校园警报器的声音怎么发出来的
发布时间:2019-11-13 14:14:15

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校园警报器

必发彩票注册 MINGLUNSHIJINGBAOQIZHONGZUIZHONGYAODEBUJIAN,ZAIGONGZUOZHONGGAOSUYUNZHUANERCHANSHENGSHENGYUAN。DINGLUNYUMINGLUNGAODUPEIHEDEBUJIAN,TONGCHANGYOU10GEZUOYOUDEFAYINCHUANGKOU;FAYINCHUANGKOUYUMINGLUNDEFAYINYEPIANXIANGDENG。 HEWOMENCHANGJIANDEKONGZHUFASHENGYUANLICHABUDUOTONGGUOMINGLUNZHUANDONG,DAIDONGKONGQIZHUANDONG,QIMOCACHANSHENGSHENGYIN。SUIZHEZHUANDONGSUDUYUEKUAIYINDIAOYUEGAO。ZHEIBIANSHIFANGKONGJINGBAODEJIBENYUANLI。DINGWEIZUOSHIGUDINGDINGWEIQIDEZHIZUO。DINGWEIZHUANGZHISHIZAIMINGLUNFEIGONGZUOZHUANGTAIXIAHUOTINGJIHOUYINCHUANGKOUNENGZIDONGBIHE,YIFANGZHILAOSHU、FEINIAO、ZHIZHU、KONGZHONGFENGCHUIDEZAWUDENGJINRUJINGBAOQINEI,QIDAOBAOHUJINGBAOQIDEZUOYONG。 ERZHANSHIDEGUODEFANGKONGJINGBAOQIYOUGEDADADEZHAOZIBUXIUGANGZHAO:YIFANGMIANSHIDUISHENGYINZHESHEHOUDEKUOSHENGZUOYONG,LINGYIFANGMIANSHIDUIZHENGGEJINGBAOQIQIBAOHUZUOYONG,FANGZHIYUSHUIJINRUJINGBAOQINEI。

TONGGUOMINGLUNCHANSHENGSHENGYUANCONGERFACHUSHENGYIN,ZHEIJIUSHIJINGBAOQIWEISHENMENENGFASHENGDEYUANLI。ZHEJIANGLONGANDIANZIYOUXIANGONGSIZHENDUITUFASHIJIANDEYINGJIFANGFANGUANLI,GONGSIZHUANMENYANFADETUFASHIJIANYINGJISHUSANXITONG,ZAIPINGSHIKEYONGZUOMONIFASHENGTUFASHIJIANYINGJISHUSANYANLIAN。


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