ʻO Drill bit, ʻo ia ka mea hana maʻamau i ka hoʻoili ʻana i ka lua, hoʻohana nui ʻia i ka hana mechanical, ʻoi aku ka nui no ka hana ʻana i nā lua i nā mea hoʻoluʻu, nā pepa paipu o nā mea hana mana, nā mea hana mahu a me nā ʻāpana ʻē aʻe.1、 Nā hiʻohiʻona o ka wili ʻana ʻO ka drill bit maʻamau ʻelua ...
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