Urgent need of help with three technical terms

[Cy Shuster]

Action diagrams:
http://rennerusa.com/ActionPartsGuide.asp

http://www.concertpitchpiano.com/UprightActionModel.html

UK names:
http://www.fletcher-newman.co.uk/catalogue/index.html

It would be great if the PTG site had labelled diagrams like this, that we 
could refer to when emailing customers.

--Cy--