ʻO ka hoʻomaka ʻana o ka hau-wāwae pōhaku drill

Ke hilinaʻi nei ka puʻu pōhaku wāwae wāwae i ka ea i hoʻopaʻa ʻia e hoʻokele i ka piston e pānaʻi.I ka wā o ka hahau ʻana, paʻi ka piston i ka huelo shank, a i ka wā o ka hoʻihoʻi ʻana, hoʻokele ka piston i ka mea hana drill e hoʻololi ai e hiki ai i ka ʻohi pōhaku a me ka wili ʻana.ʻO ka hoʻohana ʻana i nā pahu hoʻoheheʻe hydraulic piha e hoʻololi i nā pahu pōhaku wāwae wāwae he mea hiki ʻole ke ʻae ʻia i ka hoʻomohala ʻana i ka tunneling mine pōhaku.Eia nō naʻe, i kēia manawa, ʻoi aku ma mua o 90% o nā tunnels pōhaku e alakaʻi nui ʻia e ka ʻeli pōhaku wāwae wāwae.ʻO ka pahu pōhaku wāwae wāwae he mea paʻa lima, semi-mechanized (manually operated, manual moving equipment) me ka nui a me ka laulā.He mea maʻalahi ka hana a me ka mālama ʻana, a haʻahaʻa ke kumukūʻai.