A na-eme ụkpụrụ nke agụba ahụ site na iji aka hammering, nke bụ usoro ewepụtara na akụkọ ihe mere eme. Ọ na-ele anya ka mma yana bara uru karị. Otu n'ime puku iri ntụpọ ntụpọ ngwaahịa. Agaghị enwe ntụpọ dị mma n'ụzọ dị mfe.
Raara onwe ya nye iji nyere ndị ahịa aka idozi nsogbu ha kacha sie ike na nsogbu teknụzụ.
Biko dejupụta fọm dị n'okpuru ebe a, ndị otu ahịa anyị ga-akpọtụrụ gị n'oge na-adịghị anya.
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