Ukusetyenziswa kwe-twist drills kuhambelana ngqo nesitayela kunye nohlobo.Emarikeni, kukho iidrili ze-cobalt ezinentsimbi estainless, i-parabolic deep-hole twist drills, ii-twist ezinegolide, i-titanium-plated twist drills, i-high-speed steel twist drills, kunye ne-twist drill yexesha elide.I...
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