主干线 zhǔ gàn xiàn

DEFINITIONS

  1. trunk line (of road, network etc)
  2. backbone (cable)

CHARACTERS

主 zhǔ
HSK 3
master, chief owner; host; lord
干 gàn
HSK 3
oppose, offend; invade; dried
线 xiàn
HSK 4
line, thread, wire; clue