ʻO ka hoʻopiha ʻana i nā huahana aila, me ka ʻaila edible a me ka ʻaila ʻoihana.ʻO ka aila ʻai ka ʻoihana kia o ka ʻoihana ʻāina, ʻo ia kekahi o nā meaʻai nui o ko kākou ola ʻana i kēlā me kēia lā, e like me ka aila pīkī, ka ʻaila pāma, ka ʻaila hui ʻia a pēlā aku.ʻO ka aila ʻoihana ka nui o ka lubricating aila, i ke kiʻekiʻe kiʻekiʻe o ka automation ʻoihana i kēia lā, ʻaʻole hiki i nā ʻano mea hana mechanical ke hana me ka ʻole o ka lubrication, ākea ākea o ka hoʻohana.