This standard is equivalent to international standards IEC455 (1988) "device-specific wire line terminals and terminal identification and application of an alphanumeric system General." This standard specifies the subject matter of the various methods to identify electrical equipment (hereinafter referred to as the device) terminal, and developed a system of alphanumeric identification equipment terminals and specific wire line side of General. This standard applies to the identification mark terminals combination of equipment (such as resistors, fuses, relays, contactors, transformers, rotating motor, etc.), and these devices, but also to identify the specific wire line side. Necessary terminals companies, which can be given to the detailed application General of certain products and the necessary supporting identification method in the relevant standard. Reference Standard GB 4728 Graphical symbols GB5465 electrical and electronic equipment with graphic symbols This is a three-wire connection terminals, three wires are positive, negative and shield. XLR is called "balanced terminal" and "microphone plug" wholesale terminals, in general use in the professional or broadcast television terminals manufacturers love, but in some of the more top home audio equipment is also used to front-stage amplifier and a post-amplifier between the signal transmission. Advantages balanced XLR terminals that transmit signal linearity, which can greatly reduce the electromagnetic, radio frequency interference with electronic systems at work at the time of long-distance transmission of audio signals and noise and hum and terminals generated in the audio signal are essentially different. Terminals price, Maoming terminals, creating loose electrons supplied by Asahi Dongguan Shijie Xu Song Chong electronic products factory. Dongguan Shijie Song Chong-wook Electronic Products Factory (chuangxs.1688.com) strong, credible, connectors, and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chong Xu Song electronic products factory and you work into the brilliant, for a better future!