Development tendencies of clearance compensation methods in internal gear pumps Piotr Osiński, Michał Stosiak, Paweł Bury, Rafał Cieślicki, Krzysztof Towarnicki and Piotr Antoniak MATEC Web Conf., 338 (2021) 01021 Published online: 25 June 2021 DOI: 10.1051/matecconf/202133801021