rtg.

Electrical and nuclear industries
da r , røntgen
de R , Röntgen
el r , roentgen , rφntgen , ραίντγκεν
en r , roentgen , röntgen
es r , roentgen
fi röntgen
fr r , roentgen , röntgen
it r , roentgen
nl r , röntgen
pt r , roentgen