Kugeza hagati ya za 1980, amadosiye menshi ya karbide azunguruka yakozwe n'intoki.Hamwe niterambere ryiterambere rya tekinoroji yo kugenzura mudasobwa, imashini zikoresha zimaze kumenyekana, zishingiye kuri zo gukora ubwoko ubwo aribwo bwose bwo mu bwoko bwa groove rotary burrs, kandi burashobora guhuzwa nibisabwa gukata ...
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