Amaketanga okudonsa amapulasithi, aziwa nangokuthi izithwali zekhebula noma amaketanga okuhudula, Idlala indima ebalulekile ekusebenzeni kwemishini eyahlukahlukene yokukhiqiza nemishini. Lezi zingxenye zenzelwe ngqo ukuhlela nokuvikela izintambo, amapayipi, nokunye ukuxhumana okuguquguqukayo ezindaweni ezinamandla. Ukusetshenziswa kwamaketanga okudonsa ipulasitiki kuyathandwa kakhulu ngenxa yesisindo sabo esilula, ukuqina, kanye ne-restanc