Ma nā kahua o ka ʻoihana, kūkulu, ikehu, a me nā mea ʻē aʻe, ʻo nā valves nā mea hana nui, a ʻo kā lākou hana a me ka maikaʻi e pili pono i ka palekana a me ka pono o ka ʻōnaehana. ʻO ke koho ʻana i kahi mea hana valve hilinaʻi ʻaʻole wale ke kumu no ka hōʻoia ʻana i ka hana o nā mea hana, akā ke kī hoʻi i ka hoʻonui ʻana i ka hoʻokūkū o nā ʻoihana. LIKE kiwikā, e like me ka maikai-ike momoku ahi i loko o ka 'oihana, ua lilo i ka mua koho o na mea hoʻohana he nui me kona maikaʻi huahana maikaʻi, 'oihana oaoieei lawelawe a me ka maikai market inoa. E hoʻolauna kēia ʻatikala iā ʻoe i nā pono kumu o nā kiwi LIKE e kōkua iā ʻoe e hana i kahi koho naʻauao.