Izintengo ze-tungsten zase-China ziyaqhubeka nokubambeka esimweni esinzima sokulinda nokubona njengoba imakethe iqaphela amasheya e-Fanya, ihweba ngemvelo ekhaya naphesheya kanye nomdlandla ophansi wokugcwalisa impahla eluhlaza.

Njengoba izintengo zokuqondisa zezikhungo nokunikezwa kwamabhizinisi amakhulu ziphansi kunamazinga okunikezwayo okukhona, ukuzethemba kwemakethe kuthinteka kakhulu. Nakuba izinqubomgomo zokuvikela imvelo kanye nokulawulwa kwezimayini okuphelele kunemiphumela ethile emihle kumthamo wokukhiqiza kanye nezindleko ze-tungsten yempahla eluhlaza, ngaphansi komkhakha wokukhiqiza ongasemuva, ukusetshenziswa kwamabala noma impahla eluhlaza kuhlala kusezingeni eliphansi.

Imboni yokuncibilikisa imvamisa igcina izinga lokusebenza eliphansi ukuze kwehliswe ingcindezi yokubuyisela emuva, futhi inokulindela okuhlukile kumbono wemakethe. Njengamanje, kunzima ukudanjiswa ukuvimba phakathi kwabathengi nabathengisi, imakethe yokuhweba ngamabala kulindeleke ukuthi iqhubeke ibe mncane futhi abahlanganyeli bathathe isinyathelo sokuqaphela.