Definitions for "Running line"
Any line that moves.
The level, non tapered section of line found behind the belly and taper of a fly line. Most running lines are about 60 feet in length and are attached to the backing on a fly reel.
(also called working line, or lift line, or load line) This is usually 1/4" 7x19 aircraft cable. It can also be 3/16" or sometimes larger. The diameter of the cable is determined by the safe working load designed into the system.
Keywords:  railway, loops, route, opposed, track
A railway track which is part of a continuous route, as opposed to sidings, loops, etc.