Makasitomala uyu ndi wothandizira yemwe amagula zinthu zathu za tungsten carbide zaka zisanu zapitazi.

Titayesa kawiri za tungsten carbide mankhwala athu. M'chilimwe chathachi, adaitanitsa ndalama zambiri.

Anabwera kudzaona katundu wawo asanatumizidwe.

Anakhutitsidwa ndi chirichonse.

Mu Feb uno, adatipatsa dongosolo lina lalikulu.