Zibo sanjing Electric Co., Ltd. is a manufacturer of communication products, high-tech enterprises, the main products splice box, fiber optic wiring boxes, cable terminal box, cable transfer box, fiber jumpers, light adapters, fiber optic pigtail, SJ communication cableautomatic inflator, the cable pressure centralized monitoring system, the T-80 cable fault tester, the ST200 check-ray machine, ST220 check line, cable fault rangefinder, inflatable cable hydrogen leak detection instrument, cable leak meter SJA103ADSL2 + tester,SJG180 dual-wavelength stable laser light source, optical power meter SJG130, the SJG160 red light source, SJG650 red pen, written light, visible light, fiber cleaver, fiber optic fusion splicer, optical time domain reflectometer, FTTH fiber optic cable construction kit, SJD320 power cablefailure range finder, power Cable Fault fixed-point device in SJD310, SJD330 cable testing high-voltage generator, SJD360 cable path instrument, SJD380 underground cable line path detector, cable charged identification device, SJD300 cable fault tester, SJD340 cable test audio signalcontrol, cable sheath fault tester, SJD200 overhead lines current ground fault locator. Three crystal appliances, with a good brand image, technical support and sales, has become a reliable supplier such as China Telecom, China Netcom, China Railcom, radio and television operators, and a number of research institutions to establish a long-term relations of cooperation.