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A dual-serial-port single-chip with dual serial port is used as the main control chip on front terminal to collect the signals of elevator status,fault and field equipments, meanwhile communicates with the single-chip MODEM on front terminal in serial mod
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采用双串口单片机作为电梯远程监控系统前端机的主控芯片,对电梯运行状态信号、故障信号和现场接入设备状态信号进行采集,同时与集成在前端机上的单片式MODEM进行串行通讯,并通过公共电话网与服务器连接,实现电梯故障远程报警、运行状态信息记录和服务器主动呼叫查询等功能。 |
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A ducal estate.
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公爵领地 |
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A duck will not always dabble in the same gutter.
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一只鸭子不会常在同一条沟中玩水。 |
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A duck's back sheds water.
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鸭子的背部去水。 |
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A duck's quack doesn't echo, and no one knows why.
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鸭子的叫声没有回声，此谜无人能解。 |
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A duel or battle with firearms.
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枪战用火器进行的决斗或战斗 |
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A dull explosive sound, usually short and repeated, made by or as if by a laboring engine.
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嘎嚓声由或象是由工作的发动机发出单调的爆响声，通常短暂而重复 |
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A dull, pedantic speaker or writer.
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学究枯燥而迂腐的讲话人或作者 |
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A dumb person can crack a nut a lot faster than a smart person if the dumb person has a nutcracker and the smart one only has a toothpick.
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如果一个哑巴有坚果钳，而一个灵巧的人只有牙签，那么哑巴可以比灵巧人快得多地剥开坚果。 |
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A dump truck full of dirt will go with the cement truck.
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一辆装满废土的砂土车将会跟著混凝土预拌车. |
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A dunce never learns something.
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傻瓜永远学不会。 |
