Kuzungulitsa m'mphepete mwazitsulo ndi njira yochotsa nsonga zakuthwa kapena zoboola m'mphepete mwazitsulo kuti pakhale malo osalala komanso otetezeka.Opera ndi makina olimba omwe amagaya zitsulo pamene akudyetsedwa, kuchotsa slag onse olemera mofulumira komanso mogwira mtima.Makinawa amagwiritsa ntchito malamba ndi maburashi angapo kuti ang'ambe ngakhale zinyalala zolemera kwambiri.
