Biblioteca93.141 documentos en línea

Array ( [idioma] => NULL [q] => -simulation-research-on-the-influence-of-the-clearance-to-the-impact-contact-characteristics-between-coal-gangue-and-the-clearance-contained-tail-beam-structure- ) ---simulation-research-on-the-influence-of-the-clearance-to-the-impact-contact-characteristics-between-coal-gangue-and-the-clearance-contained-tail-beam-structure-----0--------------NULL------ERROR!!