描述
控制系统从结构上要充分地采用了冗余技术。对于控制系统的控制器、网络通讯等必须冗余,且各冗余设备之间必须能实现无扰切换.采用冗余结构不仅能避免控制系统的局部故障扩大事故,保证机组安全稳定运行,同时也保证设备故障的在线排除,从而消除事故隐患。
NEW Motorola Symbol LS3578-FZ Bar Code Reader
Expedited shipping available
NEW Motorola Symbol LS3578-FZ Handheld Bar Code Reader
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Motorola/symbol 2a Ap-5131-13043-wwr Ap5131 Dual Radio
FREE shipping Generous 30-day return policy
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Symbol Motorola MC7094-PKCDJQHA7WW MC7094 GSM 2D QWERTY
Complete KIT includes battery,stylus,cables, & charger