Nakong e telele e fetileng, re qotsa litafole tsa phetoho ea kantle ho naha ho ea ho ea Sechaena, empa nakong ea tšebeliso, ka lebaka la metsoako ea lik'hemik'hale tsa thepa, theknoloji ea ts'ebetso, boholo ba jeometri ba sampole le lintlha tse ling hammoho le ho nepahala ha lisebelisoa tsa ho lekanya linaheng tse fapaneng, kamano ea phetoho ea thata le matla ho theha motheo le mekhoa ea ts'ebetso ea data e fapane, re fumane hore ho na le phapang e kholo lipakeng tsa boleng bo fapaneng ba phetoho. Ho phaella moo, ha ho na maemo a kopaneng, linaha tse fapaneng li sebelisa tafole e fapaneng ea phetoho, e leng se tlisang pherekano boleng ba phetoho ea thata le matla.
Ho tloha ka 1965, Patlisiso ea Saense ea Metrology ea Chaena le li-unit tse ling li thehile litekanyetso tsa Brinell, Rockwell, Vickers le Rockwell tse sa tebang le boleng ba matla motheong oa liteko tse ngata le lipatlisiso tsa tlhahlobo, ho hlahloba kamano e tsamaellanang pakeng tsa boima bo fapaneng le matla a litšepe tsa ferrous, ka netefatso ea tlhahiso. E ntlafalitse "tafole ea rona ea phetoho ea boima ba tšepe e ntšo le matla" e loketseng letoto la tšepe tse 9 le ho sa tsotelehe sehlopha sa tšepe. Mosebetsing oa netefatso, li-unit tse fetang 100 li nkile karolo, kakaretso ea lisampole tse fetang 3,000 li ile tsa sebetsoa, 'me lintlha tse fetang 30,000 li ile tsa lekanngoa.
Lintlha tsa netefatso li abuoa ka ho lekana mahlakoreng ka bobeli a mothapo oa phetoho, 'me liphetho li tsamaellana le kabo e tloaelehileng, ke hore, litafole tsena tsa phetoho li tsamaellana le 'nete' me li fumaneha.
Litafole tsena tsa phetoho li bapisitsoe machabeng le litafole tse tšoanang tsa phetoho tsa linaha tse 10, 'me boleng ba phetoho ba naha ea rona bo batla bo lekana le karolelano ea boleng ba phetoho ba linaha tse fapaneng.
Nako ea poso: Hlakubele-26-2024
