Menene inch:
Inci (“) yanki ne na aunawa da aka saba amfani da shi a cikin tsarin Amurka, kamar na bututu, bawul, flanges, gwiwar hannu, famfo, tees, da sauransu. Misali, girman 10″.
Kalmar inch (wanda aka taƙaita a matsayin "a") a cikin Yaren mutanen Holland asalinsa yana nufin babban yatsa, kuma inci shine tsawon sashe ɗaya na babban yatsa. Tabbas, tsawon babban yatsan yatsa na iya bambanta. A ƙarni na 14, Sarki Edward II na Ingila ya ba da “daidaita inci.” Ma'anarta ita ce: tsawon uku daga cikin manyan hatsin sha'ir, wanda aka shimfiɗa daga ƙarshe zuwa ƙarshe.
Gabaɗaya, 1″=2.54cm=25.4mm.
Menene DN:
DN naúrar ma'auni ce da aka saba amfani da ita a China da Turai, kuma ana amfani da ita don nuna ƙayyadaddun bututu, bawul, flanges, kayan aiki, famfo, da sauransu, kamar DN250.
DN yana nufin ƙananan diamita na bututu (wanda kuma aka sani da ƙananan bututu). Da fatan za a lura cewa wannan ba diamita na waje ba ne ko diamita na ciki, amma matsakaicin diamita biyu, wanda aka sani da matsakaicin diamita.
Menene Φ:
Φ wata ma'auni ce ta gama gari da ake amfani da ita don nuna diamita na waje na bututu, lanƙwasa, sanduna zagaye, da sauran kayan, kuma ana iya amfani da su don nuni zuwa diamita da kanta, kamar Φ609.6mm wanda ke nufin diamita na waje na 609.6 mm.
Lokacin aikawa: Maris 24-2023
