Her er overgangstabeller for tennplugger, som kanskje noen kan ha interesse av?
http://en.calameo.com/read/001163250aedd53290d39
http://rb-aa.bosch.com/boaa-se/Product. ... lication=1
mer:
http://dl.dropbox.com/u/11663134/NGK%20 ... l%20ny.pdf