球きゅう皮ひ

noun

envelope (of a hot air balloon)

Technical term for the fabric part of a hot air balloon that holds the heated air.

• 熱ねつ気き球きゅうの球きゅう皮ひは、軽かるくて丈じょう夫ぶな布ぬので作つくられている。

  The envelope of a hot air balloon is made of light, strong fabric.