Loaʻa i nā pihi carbide cemented kā lākou hana hana ʻokoʻa, no laila ua hoʻohana nui ʻia lākou i ka ʻaila ʻaila a me ka shoveling hau, nā mīkini palau hau a me nā mea hana ʻē aʻe.
Ma ka manawa like, hoʻohana ʻia no ka mīkini ʻeli ʻana i nā mea hana mining, nā mea hana mīkini mining a me ka wehe ʻana i ka hau alanui a me nā mea hana mālama alanui.Nā mea hana i hoʻohana ʻia i ka ʻeli ʻana, mining, tunnel engineering, a me ke kūkulu kīwila.