A cikin dogon lokaci da suka gabata, mun faɗi tebur na jujjuya ƙasashen waje zuwa na Sinanci, amma yayin amfani da shi, saboda nau'ikan sinadarai na kayan, fasahar sarrafawa, girman nau'in samfurin da sauran dalilai da daidaiton na'urori masu aunawa a cikin nau'ikan kayan aiki daban-daban. kasashe , taurin da ƙarfin juyi dangantakar don kafa tushe da kuma sarrafa bayanai hanyoyin sun bambanta , mun gano cewa akwai babban bambanci tsakanin daban-daban canza dabi'u.Bugu da ƙari, babu ƙaƙƙarfan ma'auni, ƙasa daban-daban suna amfani da tebur na juyawa daban-daban, suna kawo rudani a cikin taurin ƙima da ƙarfin juyawa.
Tun daga shekarar 1965, binciken kimiyyar ilimin kimiya na kasar Sin da sauran raka'a sun kafa Brinell, Rockwell, Vickers da Rockwell taurin ma'auni da karfin dabi'u bisa adadi mai yawa na gwaje-gwaje da bincike na bincike, don gano alakar da ke tsakanin taurin daban-daban da karfin ferrous. karafa, ta hanyar tabbatar da samarwa.Haɓaka namu "baƙar taurin ƙarfe da ƙarfin juyawa tebur" wanda ya dace da jerin ƙarfe 9 kuma ba tare da la'akari da ƙimar ƙarfe ba.A cikin aikin tabbatarwa, fiye da raka'a 100 ne suka shiga, an yi amfani da samfurori fiye da 3,000, kuma an auna fiye da 30,000 bayanai.
Ana rarraba bayanan tabbatarwa daidai gwargwado a ɓangarorin biyu na jujjuyawar jujjuyawar, kuma sakamakon ya yi daidai da rarrabuwar al'ada, wato, waɗannan allunan jujjuya suna daidai da gaskiya da samuwa.
An kwatanta wa] annan alkaluman juzu'i a duniya da irin wannan teburi na jujjuyawar kasashe 10, kuma ma'aunin canjin da ake yi a kasarmu ya kai matsakaicin madaidaicin kimar canjin na kasashe daban-daban.
Lokacin aikawa: Maris 26-2024
