Wɔ mfiridwuma mu nneɛma a wɔyɛ mu no, nnwinnade a wɔsɛe no ayɛ ade titiriw a ɛka nneɛma a wɔyɛ no yiye ne nnwinnade nkwa nna bere nyinaa. Ɛnam nkɔsoɔ a ɛkɔ so wɔ nneɛma mfiridwuma mu nti, nkukuo a ɛtumi nsɛe, sɛ adeɛ foforɔ a ɛtumi nsɛe-no, anya adwene nkakrankakra. Enti, dɛn ankasa ne nkuku a ɛko tia wear-? Sɛ yɛbɛka no tiawa a, ɛyɛ dɔte a wɔde alumina na ɛyɛ titiriw, wɔde sintered wɔ ɔhyew a ɛkɔ soro mu, na ɛwɔ den kɛse koraa na ɛko tia.
Nkukuo a ɛtumi nsɛe-a wɔde di dwuma kɛseɛ wɔ mfiridwuma mu no, wɔkyerɛ sɛ ɛyɛ adwuma yie titire. Nea edi kan no, wɔda denden a ɛkorɔn yiye adi, wodu Mohs nsenia grade 9, nea ɛto so abien wɔ diamond akyi, na ɛma wotumi ko tia akasakasa ne nkɛntɛnso a efi nneɛma ahorow mu yiye. Wɔ nnwuma te sɛ mfiri a wɔde tu fam, semɛnte mfiri, ne ahoɔden a wɔde yɛ ɔhyew, baabi a nneɛma a wɔde fa nneɛma ne nea wɔbubu no taa ma mfiri no sɛe no, sɛ wɔde dɔte a ɛtumi nsɛe-di dwuma de bɔ ho ban a, ebetumi ama mfiri nkwa nna atrɛw kɛse. Nea ɛto so abien no, nkuku a ɛko tia nsɛe-wɔ nnuru a ɛtumi gyina pintinn pa, ɛko tia acid ne alkali nsɛe, na ɛma ɛyɛ adwuma sɛnea ɛsɛ wɔ mmeae a ɛyɛ mmerɛw kɛse mpo.
Wɔ ne dwumadie wɔ mfiridwuma mu nnwinnadeɛ ahobanbɔ mu akyi no, nkukuo a ɛtumi nsɛe -no nso ma mfasoɔ soronko wɔ nnwuma foforɔ mu. Sɛ nhwɛso no, wɔ pɛtro adwumayɛ mu no, wobetumi de abɔ nsu afiri a ɛwɔ mu no afasu ho ban, na ɛtew nneɛma a ɛsɛe ne nsɛe a nsɛm ho amanneɛbɔ de ba no so. Wɔ hydraulic engineering mu no, wobetumi de adi dwuma de ayɛ ayaresa a ɛko tia nsɛe-ma nneɛma te sɛ apon ne turbines, na ɛma mfiri no adwumayɛ a ɛko tia-wear no yɛ kɛse. Bio nso, nkukuo a ɛtumi nsɛe-di dwuma titire wɔ nnwuma te sɛ nkukuo mfiri ne aduane ho adwuma mfiri mu, na ɛma mmoa a ɛho hia ma nnwinnadeɛ a ɛwɔ saa nnwuma yi mu
