On the basis of line coding practice in Hefei Basin, the paper presented scientific and reasonable design principle for line coding system.
本文在合肥盆地测线编码实践基础上，提出了科学、合理的测线编码系统设计原则；
Line coding is an important step in the design of full-duplex transmission system to support ISDN subscriber line basic access.
在ISDN用户线基本接入全双工传输系统的设计中，线路编码是重要的一步。
Line coding is an important step in the design of full-duplex transmission system to support ISDN subscriber line basic access.
在ISDN用户线基本接入全双工传输系统的设计中，线路编码是重要的一步。
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