Ntchito:
Zipangizo zoyamba zophulitsira zipolopolo padziko lonse lapansi zinayamba zaka 100 zapitazo. Zimagwiritsidwa ntchito makamaka kuchotsa zinyalala ndi khungu la okosijeni pamalo osiyanasiyana achitsulo kapena osakhala achitsulo ndikuwonjezera kuuma. Pambuyo pa zaka zana za chitukuko, ukadaulo ndi zida zophulitsira zipolopolo zakhala zikukhwima, ndipo kuchuluka kwa momwe zimagwiritsidwira ntchito kwakula pang'onopang'ono kuchokera kumakampani olemera oyamba kupita kumakampani opepuka.
Chifukwa cha mphamvu yaikulu ya kuphulika kwa mfuti, n'zosavuta kuyambitsa kuchepa kwa kusalala kwa pamwamba kapena mavuto ena pazinthu zina zomwe zimangofunika chithandizo chochepa. Mwachitsanzo, mabuleki a njinga yamoto amafunika kutsukidwa mutatha kupukuta, ndipo makina ophulika amatha kuwononga mosavuta pamwamba pa zinthu zokangana. Chifukwa chake, makina ophulika mchenga akhala chisankho chabwino cha zida zoyeretsera pamwamba.
Mfundo yaikulu ya zida zophulitsira mchenga ndikugwiritsa ntchito mpweya wopanikizika popopera mchenga kapena chitsulo chaching'ono chokhala ndi tinthu tating'onoting'ono pamwamba pa dzimbiri la workpiece kudzera mu mfuti yophulitsira mchenga, zomwe sizimangochotsa dzimbiri mwachangu, komanso zimakonzekeretsa pamwamba pake kuti pakhale utoto, kupopera, kupopera ndi njira zina.