This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
KaisekiGairon.svg en are the orthogonal projection from domain to the axis and is cross section surface cut by the perpendicular plane to the axis tesigana PDJapan
Page 2023 Free-images.com. All images are Public Domain