Nkọwa nkenke:

Njirimara ngwaahịa: teknụzụ ọhụụ, ịkọ nkọ, ịmị egweri, nguzogide dị elu, ịdị ike dị elu, arụmọrụ dị elu na adịghị mfe iyi, diamond edo na aja, ezigbo ọrụ, nchekwa na nchekwa gburugburu ebe obibi, mbepụ na-enweghị mgbanaka na uru ndị ọzọ. .

Ngwaahịa ndị kwesịrị ekwesị maka: iche iche nke metal na-abụghị metal ihe, egweri tungsten ígwè, -egwe ọka egbutusị, alloys, diamonds, iko, ceramik, semiconductor ihe (sịlịkọn carbide, wdg), magnetik ihe (magnetik cores, magnetik Ibé akwụkwọ, ferrites, wdg) na ihe na-egbuke egbuke (ihe siri ike, ígwè tungsten YG8, wdg)