1, Tungsten na cobalt carbide The ọkwa mejupụtara YG na nkezi pasent nke cobalt ọdịnaya.Tungsten cobalt carbide nwere ike iji bechapụ nkedo ígwè, ọla ndị na-abụghị ígwè na ihe ndị na-abụghị ọla, a pụkwara iji ya mee ihe dị ka ọnwụ nkwụsị, oyi ịkụ ọkpọ anwụ, nozzles, rollers, hammer top, gauge ...
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