Chinese edit

gear; intimate friend; very close friend
trad. (遊星齒輪/游星齒輪) 遊星/游星 齒輪
simp. (游星齿轮) 游星 齿轮
 
Wikipedia has an article on:

Pronunciation edit


Noun edit

遊星齒輪

  1. planetary gear

Synonyms edit