Longman Dictionary of Contemporary English
supply line
noun
EXAMPLES FROM CORPUS
▪ And you've become part of the supply line now: selling on to finance your need.
▪ McCann got tighter to Vieira, and Arsenal's supply line was cut.
Wiktionary
supply line
n. The chain of transportation mechanisms supplying food and materiel to an army in battle, or other field operation.
WordNet
supply line
n. a route over which supplies can be delivered [syn: supply route]