Niki "santimetero": Inch (") ni igice rusange cyo gusobanura kuri gahunda y'Abanyamerika, nk'ibyuma by'ibyuma, indangagaciro, frows, indabyo, ibiganiro, n'ibindi, nk'ibisobanuro ni 10".
Santimeteroes . Birumvikana ko uburebure bwintoki muntu nabwo butandukanye. Mu kinyejana cya 14, Umwami Edward wa II yatanze "urwego rusanzwe rwemewe".
Biteganijwe ko uburebure bwibinyampeke bitatu binini byatoranijwe hagati yumurongo wa sayiri kandi utondekanya kumurongo ni santimetero imwe.
Mubisanzwe 1 "= 2.54cm = 25.4mm
Niki Dn: DN nigice gikunze kugaragara muburyo bwa sisitemu yubushinwa na Burayi. Nubusobanuro kandi bwo kumenya imiyoboro, indangagaciro, flanges, umuyoboro wimiyoboro na pompe, nka dn250.
DN yerekana diameter yizina ryumuyoboro (uzwi kandi nka diameter yizina), Icyitonderwa: Iyi ntabwo ari diameter yo hanze cyangwa diameter yimbere, yitwa imva yimbere.
Niki φ: φ ni igice rusange, bivuga diameter yo hanze yimiyoboro, inkokora, kuzunguruka hamwe nibindi bikoresho. Irashobora kandi kuvugwa ko ya diameter. Kurugero, φ609.6mm bivuga diameter yo hanze ya 609.6mm.
Noneho ko tumaze kumenya ibyo ibyo bice bitatu byerekana, ni irihe sano riri hagati yabo?
Mbere ya byose, "ibisobanuro bya" DN "ni kimwe na DN, mubyukuri bisobanura diameter yizina, byerekana ubunini bwiki kimenyetso, kandi φ ni uguhuza byombi.
Kurugero: Niba umuyoboro w'icyuma uri dn600, kandi umuyoboro umwe urangwa na santimetero, ihinduka 24 ". Hoba hariho isano iri hagati ya yombi?
Igisubizo ni yego! Muri rusange ni ukugwiza mu buryo butaziguye integer saa 25, bingana na DN, nka 1 "* 25 = DN25 2" * 25 = DN100 nibindi.
Birumvikana ko hariho kandi abantu batandukanye, nka 3 "* 25 = 75, santimetero imwe na 1/2" 1 "1".
1/2 "= DN15 3/4" = DN20 1-1 / 4 "= DN32 1-1 / 2" = Dn40 2-1 / 2 "= Dn90
Igihe cyohereza: Werurwe-10-2022
