Tuesday, July 4, 2017

尖峰吐氣流量器 ( A peak flow meter )



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2 comments:

  1. UnknownApril 28, 2020 at 6:38 PM

    how did u make it

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    Replies
    1. Ha ha ha, I'm comingJuly 29, 2020 at 12:53 AM

      It's quite easy.
      You just need a bottle, paper, markers, tape, and some stickers.
      After drawing the paper, paste it and the stickers on the bottle. Then it's done.
      I hope my explanation helps!

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