一定牛彩票

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        security product
        Smoke temperature composite detector Hayman HM-612DC series is a smoke temperature composite detector, smoke temperature detector product, with 9-35V power non-polar input, photoelectric sensor, micro-processing ...
        Smoke and temperature integrated compound alarm Hayman HM-620D series is a smoke and temperature integrated compound alarm, smoke and temperature combined alarm products, optional smoke and temperature combined type, wired interconnection type, no ...
        Connected photoelectric smoke detector Hyman HM-615PC series is a networked photoelectric smoke detector, connected photoelectric smoke detector products, optional two-wire smoke detector and four-wire ...
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