防毒通道 fáng dú tōng dào

DEFINITIONS

  1. protective passageway

CHARACTERS

防 fáng
HSK 5
defend; prevent; embankment
毒 dú
HSK 5
poison, venom; poisonous
通 tōng
HSK 4
pass through, common, communicate
道 dào
HSK 2
path, road, street; method, way