SLOT FOR OPTICAL FIBER CABLE

摘要

PROBLEM TO BE SOLVED: To prevent the deformation of spiral grooves 5. SOLUTION: The deformation of spiral grooves 5 is prevented by preventing the slant of a rib 6 by providing a projection 4 on the outer peripheral part of a primary coating layer 2 along a portion corresponding to the root of the rib part 6 formed between the spiral grooves 5 of the outer peripheral part of a secondary coating layer 3.