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St/Upc/APC 1-60dB Single Mode 0.9mm 2mm Optical Cable Connector Online Adjustable Fiber Optic Attenuator, Find Details and Price about APC Attenuator Attenuators from St/Upc/APC 1-60dB Single Mode 0.9mm 2mm Optical Cable Connector Online Adjustable Fiber Optic Attenuator - Shanghai Fiber Cloud Communication Technology Co., Ltd