zhǔ​gàn​xiàn

backbone

主干线 (主幹線) zhǔ​gàn​xiàn
backbone noun
central, high-capacity link or cable in a data or telecommunications network
trunk line noun
main route or arterial line of a transportation system, such as a road or railway

Frequency

Movie subtitles
0.060 per million appears in 0% of films
Written text
0.859 per million

Sources

Definitions
CC-CEDICT