Monomotor bogies , where both axles of the bogie are driven by a single motor , often encounter torsional resonances, which lead to periodic longitudinal slip.
The general formula about the calculation of downslide force and resistance to sliding in the arbitrary unit of landslide is deduced in the digital landform image.
Supercalender: A calendering stack with alternate hard steel rollers and soft rollers, some of which move faster than others, which imparts a high gloss finish to paper as it "slips" between them.