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この万有引力のモデル実験ではポリウレタンの布が使われていますが、なぜポリウレタンなんでしょうか？
またこのような布はどこで購入できますか？
ポリウレタンはゴムのような伸縮性があるからです。
かといって、ゴムでは固すぎてうまくいかないと思います。
生地は「生地の三徳」から購入しました。
以下のページから買えます。私が買った２ｍ×２ｍのサイズで、３０００円ちょっとです。
http://www.santoku-kiji.co.jp/dvinti/nobiru/1-2-200.html
I just want to tell you that I am just newbie to blogging and seriously liked this web-site. Likely I’m likely to bookmark your blog . You surely have amazing writings. Thanks a bunch for sharing your web page.
Can I just say what a reduction to find someone who truly is aware of what theyre talking about on the internet. You definitely know tips on how to convey a problem to light and make it important. More individuals have to read this and perceive this side of the story. I cant consider youre not more common because you positively have the gift.