Kupanikizika kopsinjika ndi mtundu wa njira yosinthira pang'ono ndi kudula pang'ono komanso kukhazikika kwamitundu yopumira kwambiri ndikuwombera .
Popeza kupanga kwa chinthucho ndi njirayi ndi yopanga bwino kwambiri, njira yosavuta, yopatsirana bwino kwambiri, motero yakhala gawo lofunikira kwambiri pakugulitsa kwa China {{0}
Njira yotupa ndi njira yomwe zinthu zitatu zazikuluzikulu za makina osokoneza bongo, nkhungu yovuta, ndipo nthawi yaukadaulo imatha kugwirizirana ndi zomwe zimachitika {5 {{5 {{5 Kutentha ndi nthawi ziyenera kutsindika {{10} .
