备用

Said in one Chinese podcast line.

• 就是当时豆茶的必备用具之一

  It was one of the essential tools for making bean tea at that time.

  

  香港電台：茗茶樂茶具文物欣賞

The shows belong to their publishers, and each line plays from the publisher’s own file. Translations are machine-made. Chinese books and courses on Amazon (affiliate link).