Accordion symbols

[Urs Liska]

Hi list,

could someone be so kind as to give me some _very_ short descriptions of 
the eight accordion glyphs that can be seen in the table at the beginning of
http://lilypondblog.org/wp-content/uploads/2013/09/accordion-glyphs-definition.pdf?

They should be as short as to be fitting where now the "description" 
dummy is.

TIA
Urs