| 摘要 |
PURPOSE: A multiple extruder-type optical cable duct is provided to extend the length of cable by linking an optical duct unit which is a uniformly extruded duct from external unit and inner unit by using a coupler or a socket. CONSTITUTION: A multiple extruder-type optical cable duct includes the following steps. An external unit(3) and an inner unit(2) are extruded instead of being profile extruded. Accuracy and an advanced epicenter are acquired by the process. A rotation preventive unit(14) is set at the part where external unit(3) and inner unit(2) contact so as to prevent inner unit(2) from rotating inside an external unit(3). A series of optical duct units(10) are linked to one another toward the direction of the length. The series of optical duct units(10) are set more accurately and easily.
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