"But then again, I've never seen anything a Wookiee couldn't build or fix, given enough grease and transmission wire."
Lando Calrissian comments on the abilities of the Wookiees.[src]

Transmission wire was a type of wire used in the manufacture and upkeep of objects.

Wookiees were described by Lando Calrissian to be able to construct and repair anything, provided they possessed enough grease and transmission wire.