North Korea now use filament winding machines to make lightweight, long range airframes for it's rockets and ICBMS. It takes large spools of advanced composite filaments as the input and outputs airframes.

Impressive for such an impoverished nation.

http://www.38north.org/2017/08/melleman082517/

http://www.armscontrolwonk.com/archive/1203086/wound-filamen...

http://edition.cnn.com/2017/08/23/asia/north-korea-missile-p...