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Including Indoor tighten fiber optic cable and Outdoor loose pipe fiber optic cable. Used in telecom net,telcom appliance and such applianced using appliance using the series of technology,supporting block digit transmit.Indoor fiber optic cable is suitable for indoor application,communication appliance and the transmission cable digit transact equipment. Outdoor fiber optic cable is suitable for shelf in the air,pipeline,embeding under earth. According to the norm of IEC794-1996,GB/T 7424-1998,Indoor fiber cable has the advantage such as dexterity,small overall diameter and light,Outdoor fiber optic cable has vertical package using steel,the mechanic character and electric character are good,using flame retardant or LOSH.