Slope Curve 1 x 4
https://gyazo.com/9405ea0a118689ccf22af28ddd537948
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This page is auto-translated from /nishio/スロープ カーブ 1 x 4. If you looks something interesting but the auto-translated English is not good enough to understand it, feel free to let me know at @nishio_en. I'm very happy to spread my thought to non-Japanese readers.