上位占有や

https://www.google.com/search?q=Trott%20Curve&tbm=isch&hl=ja&tbs=rimg:CaN6OYj3LZ3aYULzUYTZrpln&sa=X&ved=0CBsQuIIBahcKEwjomZqf5vntAhUAAAAAHQAAAAAQBw&biw=787&bih=317