ʻO ka mīkini hana kaʻa kaʻa he mea hana i hoʻohana ʻia e hana i nā kaʻa a i ʻole nā ala no nā ʻōnaehana kaʻaahi.Hoʻohana ka mīkini i kahi ʻano o nā wili e kulou a hana i kahi wili metala i ka nui a me ke ʻano i makemake ʻia me ka pololei a me ka paʻa.ʻO ke kaʻina hana ʻo ia ka hānai ʻana i kahi kaula kila pālahalaha ma o ke ʻano o nā wili e hoʻoheheʻe mālie i ka metala i loko o ka ʻaoʻao makemake.Hoʻohana ʻia nā kaʻa kaʻa i nā ʻōnaehana kaʻa like ʻole, me nā subways, nā kaʻaahi a me nā trams.
Ke ʻimi nei i kahi ala hilinaʻi a maikaʻi hoʻi e hana ai i nā ʻāpana kaʻa kaʻa kiʻekiʻe?Hāʻawi kā mākou mau mīkini hana orbital roll i ka hopena kūpono.Hoʻolālāʻia kā mākou mau mea hana e hana i nā mea me ka ikaika, ka lōʻihi a me ke kūpaʻa e hoʻokō i nā pono o nā papahana halihali o nāʻano nui.