Kusar ya taamashi a cikin ANS I , D I N da rubu mai tsawo, kula daidai shi a cikin round pin toothed chain da rolling pin toothed chain; Yanzuwa na kungiyar materiyar da teknoloji mai binciken labarai da aka biyu kuna wannan suna kasance ne yadda suka soya gabatarwa, suka soya wani gabatarwa tsakar e r tsallarwa da idafa a cikin bayanai
Yi kewaye a cikin saukon alamannan, sayyari mai wakkwara, harshe sayyarun a cikin gaba da makarantunai. suna yi idafarwa daga yadda na makarantarwa da fasalinai. misali takardun, tsarin tsaye, tsarin shirya, takardun taimaka, lissafi saukon alamannan, steam turbine da akwatin.