Mochini oa ka ntle oa trapezoidal o leketlileng lebota ke sesebelisoa se ikhethileng se sebelisetsoang ho etsa lishiti tsa tšepe ka har'a lithaelese tsa trapezoidal kapa libopeho tse otlolohileng tsa poleiti, tseo hangata li sebelisetsoang ho aha mokhabiso oa kantle oa lebota. Mochine o na le mesebetsi ea ho fepa, ho theha le ho itšeha ka mokhoa o atlehileng, 'me o khona ho hlahisa lithaelese tsa trapezoidal kapa lihlahisoa tse otlolohileng tsa boto, ho ntlafatsa katleho ea tlhahiso le ho netefatsa boleng ba sehlahisoa.