Nā Kūlana Kūlana o nā Pile Pepa kila

ʻEkolu mau hiʻohiʻona ka nui o nā puʻu ʻili kila wela.ʻO nā ʻāpana kila U, ʻO nā puʻu pepa kila me ke ʻano Za me nā puʻu pepa kila laina. E nānā i ka Kiʻi 1 no nā kikoʻī. Ma waena o lākou, ʻoi aku ka nui o nā kumukūʻai Z-shaped a me nā laina laina laina ma muli o kā lākou hana paʻakikī, hoʻoili a me nā kaʻina hana. He 1/3 kiʻekiʻe ma mua o nā puʻu pepa kila U. I kēia manawa ua hoʻohana nui ʻia ma ʻEulopa a me ʻAmelika Hui Pū ʻIa. Hoʻohana nui ʻia nā puʻu kila U-like ma Asia, me Kina.