"Inchi": inchi (") ndi gawo lodziwika bwino la American System, mavuvu, mabotolo, mapiko, ndi zina zambiri.
Nsongaes (inchi, wachidule monga.) amatanthauza chala mu Dutch, ndipo inchi imodzi ndi kutalika kwa chala. Zachidziwikire, kutalika kwa chala chamunthu ndikosiyananso. M'zaka za zana la 14, King Eddord ii adatulutsa "inch inch yoyenera".
Amalembedwa kuti kutalika kwa mbeu zitatu zazikulu kwambiri zomwe zasankhidwa pakati pa khutu la barele ndipo zidakonzedwa motsatana ndi inchi imodzi.
Nthawi zambiri 1 "= 2.54cm = 25.4mm
Kodi DN: DN ndi gawo liti lomwe limagwiritsidwa ntchito kawirikawiri mu makina achi China ndi ku Europe. Ndilo chitsanzo chodziwitsa mapaipi, mavuvu, ma flanges, zoyezera za chitoliro ndi mapampu, monga DN250.
DN ikutanthauzanso mainchesi a nomwenal wa chitoliro (chodziwikanso ngati mainchesi mwadzina), Chidziwitso: Ino si gawo lakunja komanso mainchesi wamkati, omwe amatchedwa theka lamkati.
Kodi φ: φ ndi gawo liti, lomwe limatanthawuza m'mimba yakunja yamapaipi, zitsulo, zitsulo zozungulira ndi zida zina. Zitha kunenedwanso kuti ndiofalikira. Mwachitsanzo, φ699.6mm amatanthauza m'mimba yakunja ya 609.6mm.
Tsopano popeza tawerenga zomwe zigawo zitatuzi zikuimira chiyani, kulumikizana ndi chiyani pakati pawo?
Choyamba, "tanthauzo la" DN "lili lofanana ndi la DN, kwenikweni limatanthawuza mainchesi mwanyimbo, kuwonetsa kukula kwa mawonekedwewa, ndipo φ ndiko kuphatikiza awiriwo.
Mwachitsanzo: Ngati chitoliro chachitsulo ndi DN600, ndipo chitoliro chomwechi chachitsulo chimadziwika ndi mainchesi, amakhala 24 ". Kodi pali cholumikizira pakati pa awiriwa?
Yankho ndi lakuti inde! Inch inch ndiye kuchulukitsa mwachindunji kwa manambala pafupifupi 25, omwe ndi ofanana ndi DN, monga 1 "* 25 = DN25 2 = DN1 = DN100 ndi zina zambiri.
Zachidziwikire, palinso ena osiyanasiyana, monga 3 "* 25 = 75, ozunguliridwa ndi ma semicoloni kapena 1/2/15.
1/2 "= DN15 3/4" = DN20 1-1 / 4 "= DNE3-1 / 2 = 2" = DN90
Post Nthawi: Mar-10-2022
