✔Hoʻomau ka wikiwiki kiʻekiʻe a me ka pololei kiʻekiʻe e hōʻoia i ka huahana
✔ʻAʻohe mea hana a hoʻololi ʻia me ka hoʻopili ʻole ʻana a me ka hana maʻalahi
✔ʻAʻohe palena o ke ʻano, ka nui, a me ke kumu hoʻohālike e ʻike i ka hana maʻalahi
Mea Hana:carbon steel, stainless steel, alumini alumini, titanium alloy, galvanized sheet, galvanize sheet, keleawe, keleawe a me nā mea metala ʻē aʻe
Nā noi:Metala pā, Threaded flange, Manhole uhi, etc.