Uchungechunge lwe-Wuhan Ninestones X6/X7/X8.

Uchungechunge lwe-X6/X7 luyi-PDC ebanzi ephezulu enengcindezi yokwenziwa engu-7.5-8.0GPa.
Ukuhlolwa kokumelana nokugqokwa (igwala lokusika elomile) lingu-11.8Km noma ngaphezulu. Zinokumelana nokugqokwa okuphezulu kakhulu kanye nokuqina komthelela, kulungele ukubhola ngezindlela ezihlukahlukene eziyinkimbinkimbi kusukela kokumaphakathi kuya kokuqina, nokuvumelana nezimo ezinhle ku-quartz sandstone, i-limestone, namadwala aphakathi nendawo aqinile. Uchungechunge lwe-X6 lubonakala ngokubamba okuphezulu okusikayo kanye nesivinini esikhulu sokumba.
Uchungechunge lwe-X8 luyi-PDC enengcindezi ephezulu kakhulu enengcindezi yokwenziwa engu-8.0-8.5GPa
Ukuhlolwa kokumelana nokugqokwa (igwala lokusika elomile) lingu-13.1Km noma ngaphezulu. Ngokusekelwe ekuphikiseni umthelela omkhulu, inokumelana nokugqokwa okuphezulu kakhulu futhi ifanele ukubhola ngezindlela ezihlukahlukene, ikakhulukazi ekwakhekeni kwamadwala okuyinkimbinkimbi njengokubunjwa okuphakathi nendawo kuya kokuqina okuqinile okunama-interlayers.