管道 guǎn dào — tubing
guǎn (third tone, dipping) dào (fourth tone, falling)guan3 dao4
tubing
Level 6· 2021 three-band, nine-level proficiency standardnoun
Meanings
tubing
tubing; pipeline; (fig.) channel; means
noun
tubing
tubing
tubing; pipeline; (fig.) channel; means