For an unified and correct IFToMM terminology in the area of gearing

The presentation of this paper is provoked by the fact that in such a huge class of gear trains, as gear trains with mobile axes of gears, there is no definite agreement in the use of terms in different languages and sometimes even in one language. Therefore it is very important to establish a logical, correct, explicit and unambiguous terminology that could help facilitate intensive contacts and interchange of knowledge and technologies among different countries in the time of rapid globalization of the world.