Nthawi zambiri pamakhala anzanu omwe samamvetsetsa mgwirizano pakati pa "DN", "Φ"Ndipo" "". Masiku ano, ndidzafotokozera mwachidule ubale womwe uli pakati pa atatuwo, akuyembekeza kukuthandizani!
Kodi inchi "
Inchi (") ndi gawo limodzi lodziwika bwino mu Some America, monga mapaipi achitsulo,mavuvu, mabowo, mapiritsi, mapampu, matees, ndi zina zambiri, monga mawonekedwe ake ndi 10 ".
Inchi (inchi, yodulidwa ngati.) Imatanthawuza chala ku Dutch, ndipo inchi ndi kutalika kwa chala. Zachidziwikire, kutalika kwa chala kumasiyananso. M'zaka za zana la 14, King Erdord ii adalimbikitsa "inchi yovomerezeka yovomerezeka". Kutulutsa ndikuti kutalika kwa mbeu zitatu zazikulu kwambiri zomwe zasankhidwa pakati pa makutu a barley ndikukonzedwa mu mzere ndi inchi imodzi.
Nthawi zambiri 1 "= 2.54cm = 25.4mm
Kodi DN
DN ndi gawo loyerekeza lomwe limagwiritsidwa ntchito kwambiri ku China ndi makonzedwe aku Europe, komanso kutanthauzira mapaipi odziwika,mavuvu, zotupa, zoyenerera, ndi mapampu, mongaDn250.
DN ikutanthauzanso mainchesi a nomwelis wa chitoliro (chodziwikanso ngati mainchesi mwadzina)
Ndi chiyaniΦ
Φ ndi gawo lodziwika bwino, lomwe limatanthawuza m'mimba mwa mapaipi, kapena malekezero, zitsulo zozungulira ndi zinthu zina.
Ndiye kulumikizana ndi chiyani pakati pawo?
Choyamba, matanthauzidwe ake ndi "" "ndipo" DN "ali ofanana. Amatanthawuza mainchesi mwadzina, kuwonetsa kukula kwa izi, ndipoΦ ndi kuphatikiza kwa awiriwo.
Mwachitsanzo
Mwachitsanzo, ngati chitoliro chachitsulo ndi DN600, ngati chitoliro chachitsulo chiri chomata mainchesi, amakhala 24 ". Kodi pali cholumikizira pakati pa awiriwa?
Yankho ndi lakuti inde! Inchi General ndi chiwerengero chochuluka ndi 25 ofanana, monga 1 "* 25 = 5 = 5- 4 = 2-1 / 2 ", 3- 2: 2" Izi sizingawerengere monga choncho, koma kuwerengera kuli chimodzimodzi, makamaka mtengo wotsimikizika:
1/2 "= DN15
3/4 "= DN20
1-1 / 4 "= DN32
1-1 / 2 "= DN40
2 "= DN50
2-1 2 "= DN65
3 "= DN80
Post Nthawi: Feb-03-2023
