No ke aha he 21-niho pāpale ma kēlā me kēia pāpale ʻōmole pia?

I ka hopena o ka makahiki 1800, ua hana a hoʻopaʻa ʻo William Pate i ka pāpale ʻōmole niho 24. Ua hoʻomau ka pāpale niho 24 i ke kūlana ʻoihana a hiki i ka makahiki 1930.
Ma hope o ka puka ʻana o nā mīkini ʻakomi, ua hoʻokomo ʻia ka pāpale ʻōmole i loko o kahi hose i hoʻokomo pono ʻia, akā i ke kaʻina o ka hoʻohana ʻana i ka pāpale 24-niho ua ʻike ʻia he mea maʻalahi loa ka pale ʻana i ka hose o ka mīkini hoʻopiha piha, a ma hope i hoʻohālikelike ʻia i kēia lā 21-niho pōleʻa.
Loaʻa i ka pia ka nui o ka carbon dioxide, a ʻelua mau koi kumu no ka pāpale, hoʻokahi kahi sila maikaʻi, a ʻo ka mea ʻē aʻe e loaʻa i kahi occlusion, i kapa pinepine ʻia he pāpale ikaika. ʻO ia ke ʻano o ka nui o nā pleats i kēlā me kēia pāpale e like me ka wahi pili o ka waha o ka hue e hōʻoia i ka nui o ka ʻili o kēlā me kēia pleat, a ʻo ke sila wavy ma waho o ka pāpale e hoʻonui i ka friction a hoʻomaʻamaʻa i ka wehe ʻana.
A ʻo kekahi kumu ʻē aʻe e pili ana ka helu o nā serrations ma ka pāpale i ka 21 me ka wehe ʻana i ka hue. Nui nā kinoea i loko o ka pia, no laila inā wehe pono ʻole ʻia, maʻalahi loa ka hōʻeha ʻana i nā kānaka. Ma hope o ka hana ʻana o ka ʻōmole wehe e pili ana i ka wehe ʻana i ka pāpale omole, a ma o nā niho ʻike i hoʻololi mau ʻia, a ua hoʻoholo hope ʻo ka ʻōmole no ka ʻōmole ʻōmole 21-niho, wehe ka mea maʻalahi a palekana, no laila ʻike ʻoe i nā pāpale hue pia he 21 serrations.