This sealing ring is black with a yellow spot and made from nitrile rubber and is the sealing ring to be used where there are petrol or oil residues on the waste water (e.g. in connection with oil and petrol separators at service stations, garages etc.).
The polar circumference (logitudinal circumference) of the Earth is about 40,008 kilometers (24,860 miles). The equatorial circumference of the Earth is about 40,075 kilometerâ¦s (24,901 miles). More Precisely: Earth is not a perfect sphere, but is an oblate spheroid, .336% flattened along the North-South axis.
I seem to remember that the circumference of the earth along the equator is roughly 24,901.92 miles (heh heh!). Well, there's 360 degrees in a circle, so if we divide 24,901.92 miles by 360 degrees, we get 69.172 miles per degree! How's that!