Mecacacmed e like me ka papa hana hana hydraulic i ka lumi hana a me ka mea kūʻai aku ma Kina, hana a hiki iāʻoe ke hōʻoiaʻiʻo i ka hana o ka hana. Ināʻaʻoleʻoe eʻike i kāu papa hanaʻo hydraulic hana i ka lumi hana ma kā mākou papa inoa, hiki iāʻoe ke heluhelu me nā lawelawe i hoʻopiʻiʻia.