Kumukūʻai hale hana kiʻekiʻe puʻe ea dth pōhaku wili hāmare

I nā hāmare DTH, ʻo ka bit drilling bit ka hoʻomau ʻana o ka shank, kahi e paʻi pololei ai ka piston drill pōhaku.No ka pili pono o ka piston me ka bit drill, nalowale ka ikehu.Hāʻawi kēia i nā hamare DTH i kahi helu komo mau ʻole me ka nānā ʻole i ka lōʻihi o ka lua.
• Nā anawaena wili liʻiliʻi a liʻiliʻi
• Ke hana nei ma ka laulā puʻe haʻahaʻa, hiki ke wili i ka lōʻihi o ka lua pāpaʻu a i waena