Kuyamelana nokuguguleka ngempilo yensizakalo ende engakuthuthukisa kakhulu ukusebenza kwemishini futhi yonge izindleko.
Kufanelekile ukufaka amakhorali ezakhiweni ezilukhuni kakhulu, njenge-sandstone.
Ikhodi yomkhiqizo: DNC201
I-IADC: M712
Ukubhoboza ukwakheka okuphakathi kuya kokunzima.
Ifanelekile ukufaka amakhorali ekwakhekeni okuphakathi kuya kokuqinile ngezinga elithile lokwakheka okuthembekile.
Kufanelekile ukusebenza kwe-coring ekwakhekeni okuphakathi n okunzima okunesici sesikhathi sokuphila eside.