All the conventional methods to install cable pulling by winch or manpower.

These methods may include the following problems.

[When pulling by a winch]

-Cable overload

-Risk of damaging facilities

-Space constraint when installing winch

-Limited distance to be cable-installed at once

-Inconvenience of having to pull the cable out

  multiple times for complex-shaped routing

-Risk of safety accidents

[When pulling by manpower]

-Increased need for man-hours

-High level of cooperative proficiency required

  (work efficiency decreases otherwise)

-Excessive physical burden on workers

-Inconvenience of having to pull the cable out

  multiple times before the point of arrival

-Risk of safety accidents