Nā ʻano hana:
ʻO ke kūpaʻa wela kiʻekiʻe maikaʻi loa, ʻaʻole maʻalahi ka ʻaila i ka lilo ʻana o ka ʻāpana friction ma kahi mahana wela kiʻekiʻe, e hoʻolōʻihi ana i ke ola lawelawe o ka mīkini;
Maikaʻi fluidity e hōʻoia i ka pumpability o ka aila;
ʻO ke kūpikipiki maikaʻi loa a me ka hana anti-Wear e hālāwai me nā koi lubrication o ka ukana kiʻekiʻe a i ʻole nā lako hoʻouka haʻalulu;
ʻO ke kūpaʻa hoʻoweliweli maikaʻi e hōʻoia i kahi ola lōʻihi i ka hoʻohana ʻana o ka momona.
Nā lakohana pili pono:
Ka hoʻonoe ʻana i nā ʻāpana hakakā kiʻekiʻe o ke ana wela a me nā pono ukana kaumaha i ka ʻoihana metallurgical, nā motika nui, nā paila paila ʻaila wela a me nā pono hana ʻenehana
