Comparison of Containing Inner Layer Optical Unit and Non-Containing Inner Layer Optical Unit<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

伊藤宏明 Ito Hiroaki
副总经理 Vice General Mangager
中天日立光缆有限公司 Zhang Tian Hitachi Optic Fiber Cable Co., Ltd.

　　　　　　　　　　　　　　Abstract
　　This Paper Describes the Characteristics of Stainless Tube OP-Unit and the Controlling of Fiber Excess Length of Different Type OPGW. Zhongtian Hitachi Has Developed the Stainless Tube OP-Unit Containing Inner Layer Tube, It has Better Using Performance. This Paper Emphases to Introduce the Craftwork Characteristics and Test Validation of New Type OP-Unit.
　　Key works：OPGW, Inner Layer Tube, Stainless Tube, OP-Unit, Fiber Excess Length