Ugbu a enwere ọtụtụ ụlọ ọrụ ga-eji igwe polishing na-akpaghị aka na-arụ ọrụ, igwe polishing na-akpaghị aka nwere ike na-atụgharị, polishing, wepụ burr na ọrụ ndị ọzọ. N'ezie, ịcha ọkụ na imecha nwere ike iji aka ya, mana iji igwe na-ekpo ọkụ na-akpaghị aka nwere ike ịdị mfe karị na ac ...
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