He aha ka ʻīniha:
ʻO ka ʻīniha (“) he ʻāpana ana maʻamau i hoʻohana ʻia ma ka ʻōnaehana ʻAmelika, e like me nā paipu, valves, flanges, elbows, pumps, tees, etc. No ka laʻana, he 10″ ka nui.
ʻO ka huaʻōlelo ʻīniha (i hoʻopau ʻia ʻo “in.”) ma ka ʻōlelo Dutch ʻo ia ka manamana lima, a ʻo ka ʻīniha ka lōʻihi o kahi ʻāpana o ka manamana lima. ʻOiaʻiʻo, hiki ke ʻokoʻa ka lōʻihi o ka manamana lima o ke kanaka. I ke kenekulia 14, ua hoʻopuka ʻo King Edward II o ʻEnelani i kahi "iniha kānāwai maʻamau." ʻO kāna wehewehe ʻana: ʻo ka lōʻihi o ʻekolu o nā hua bale nui loa, waiho ʻia i hope a i hope.
ʻO ka maʻamau, 1″=2.54cm=25.4mm.
He aha ka DN:
ʻO DN kahi ʻāpana ana maʻamau i Kina a me ʻEulopa, a ua hoʻohana ʻia e hōʻike i nā kikoʻī o nā paipu, valves, flanges, fittings, pumps, etc., e like me DN250.
ʻO ka DN e pili ana i ke anawaena inoa o ka paipu (ʻike pū ʻia ʻo ka nominal bore). E ʻoluʻolu, ʻaʻole kēia ke anawaena o waho a ʻaʻole hoʻi ke anawaena o loko, akā ʻo ka awelika o nā anawaena ʻelua, ʻike ʻia ʻo ke anawaena waena.
He aha ka Φ:
ʻO Φ kahi anana maʻamau i hoʻohana ʻia e hōʻike i ke anawaena o waho o nā paipu, nā piko, nā kaola pōʻai, a me nā mea ʻē aʻe, a hiki ke hoʻohana ʻia e kuhikuhi i ke anawaena ponoʻī, e like me Φ609.6mm e pili ana i kahi anawaena o waho o 609.6 mm.
Ka manawa hoʻouna: Mar-24-2023
