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.
Today we know that the circumference of the Earth is 24,901 miles. An easy way to remember is that the tangential velocity of Earth at the equator is about 1,000 miles per hour (this is why countries launch their rockets as close to the equator as possible and they always fly towards the east - the direction of rotation). A day takes 24 hours, so the Earth must be about 24,000 miles around.