Mu rwego rwo gukwirakwiza ingufu za mashini, gukoresha ibikoresho birahari hose, hamwe na buri bwoko butanga inyungu zidasanzwe kubikorwa byihariye. Muri ibyo, ibikoresho bya bevel helical, cyane cyane iyo byinjijwe mubigabanya, bigaragara nkisonga ryubuhanga bwubuhanga. Bevel g ...
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