laserová bariéra - Four beams Detector 20 meters photoelectric infrared laser sensor grating for infrared alarm detector / IR barrier sensor

laserová bariéra
 - Four beams Detector 20 meters photoelectric infrared laser sensor grating for infrared alarm detector / IR barrier sensor

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laserová bariéra - Four beams Detector 20 meters photoelectric infrared laser sensor grating for infrared alarm detector / IR barrier sensor