JTY-GM-D22 Ex point-type photoelectric smoke detector_Automatic fire alarm system_Fire protection integrated control system_Products_Shanghai Qiaoning Industrial Co., Ltd.

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JTY-GM-D22 Ex point-type photoelectric smoke detector

JTY-GM-D22 Ex point-type photoelectric smoke detector

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Automatic fire alarm system

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JTY-GM-D22 Ex point-type photoelectric smoke detector