According to the number of fibers in the cable, fiber units or loose tubes (stranded or central) cables are mostly used. A combination of these two techniques is also reported.
按照光纤的芯数，分别采用光纤单元或者松管结构(层绞松管或中心松管)，也可以将这两者结合起来。
2
Fiber optic cables include central tube type FOC, tube-stranded type FOC, fiber optic ribbon cable, ADSS and series product for distribution.