https://www.ymzdcs.com/product/siemens-plc/siemens-fdo181-smoke-detector-fdo183-photoelectric-smoke-fire-detector/
Siemens FDO181 Smoke Detector FDO183 Fire Detector - ymzdcs
Siemens FDO181 Smoke Detector FDO183 Photoelectric Fire DetectorI. General description: FDO181 point-type photoelectric smoke fire detector utilizes an .
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