Cold forging bụ ụdị nke ziri ezi plastic akpụ technology, na machining enweghị atụ uru, dị ka ezi n'ibu Njirimara, elu arụpụtaghị ihe na elu ihe itinye n'ọrụ, karịsịa adabara maka uka mmepụta, na ike ga-eji dị ka ọgwụgwụ ngwaahịa mmepụta usoro, oyi forg .. .
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