Van Diagram Three Way. The round pin style is very rare. The diagram shows that there are three quartet excited states.
He is an eccentric old dutch professor doctor. The rv style 7 way with flat pins or blades is very common. Fallow areas fall outside this reading gravity path and receive minimal attention unless emphasized visually in some way.
It is drawn using pdm technique.
One has flat pins which are often referred to as blades. This image was captured in hopkinsville kentucky during the 2021 eclipse. Already in 1890 it became the largest producer of musical instruments in the world. The symbols in these signatures are abstract set.