Forged ke moetsi ea tsebahalang oa litšepe tse refractory China. Ka boiphihlelo ba lilemo tse 20 le nts'etsopele ea lihlahisoa tse fetang 100, re utloisisa hantle boitšoaro le bokhoni ba molybdenum, tungsten, tantalum le niobium. Ha re kopane le lisebelisoa tse ling tsa tšepe le tsa ceramic, re ka fetola thepa ea tšepe hantle ho latela litlhoko tsa hau tse ikhethileng.
Likhoebo tsa rona li hokae: Ho fihlela hajoale re thehile litsamaiso tsa prosy agent naheng ea Algeria, Egypt, Iran, Afrika Boroa, India, Malaysia le linaheng tse ling tsa Asia Boroa-bochabela. Hape le Middle East le Amerika Boroa. Re na le molekane le palo e kholo ea bareki.
