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自1985年开始，小型PLC首先是三菱电机公司的MELSEC-F，通过非渠道进入中国市场。不到三、四年时间，小型PLC就形成了大面积的推广应用局面。1990年以后，Siemens、Allen Bradley以及其它品牌开始大举进入中国市场，占据中、大型的PLC的较大份额
由上简要回顾可知，PLC在中国已经形成了规模巨大的应用市场，但并未建立批量生产、有持续开发发展能力的PLC制造业。
应指出的是：
在国内，PLC的应用水平还是不低的，自主设计、系统集成和现场投运的能力，可以说与国际主流水平同步；
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Tektronix OTS9040 OC3 -48/ STM1 -16 Optical Test System
Sadelco DisplayMax 800CLI Signal Level CATV Meter 800
Datacom Textron LANcat Vx 100 MHz Cat5 Certifier Tester
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