plastic drag chains:
function:
usde in CNC machine tool and many other machines
feature.
each joint of the energy chain can be opened up so it is facilitated to maintenance and repair
it improves the electric cables in a mess, makes cable collected, so the operation of automation machine is safe.
it gives low noises and  anti-wearing while running
it is suitable for quick movements, and heat-resistent.
the sturdy structure makes it not liable to distort