Nā niho huila
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niho pōʻai parabolic
Hoʻohana nui ʻia ka niho parabolic e like me ka lihi a me nā niho waena o kahi drill bit down-hole, me ka ʻawaʻawa haʻahaʻa a me ka pōhaku paʻakikī!
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hoʻokomo ʻano ʻano hemi-spherical
Hoʻohana nui ʻia ka niho conical ma ke ʻano he niho waena o kahi drill bit down-hole, kūpono i nā pōhaku me ka ʻino a me ka paʻakikī!Ke palupalu ka pōhaku, hiki ke hana ʻia nā niho lihi!
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niho conical
Hoʻohana nui ʻia nā niho spherical ma ke ʻano he niho lihi no ka hoʻoheheʻe ʻana i lalo a kūpono hoʻi no nā pōhaku ʻino a paʻakikī.
