Helu patent kumu ho?ohana: ZL201820284980.6

?O ka papa lalo o ka pahi he ?oki ?ia a ho?ohālikelike ?ia, ?o ka bushing e hana pololei ?ia, a ?o ka pahi i ho?opa?a ?ia a ho?oma?ama?a ?ia Ma hope o ka pau ?ana o ka wili ?ana, ua hana maika?i ?ia nā pō?ai o loko a me waho e hana i ka nui o ka pā o 16mm pa?i kila, a ?o ka maka i hana ?ia me φ14mm kila poepoe, e ?oi aku ka pa?a o ka hale.