Ngwaahịa
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Kim ngwa ngwa
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Nance loop na-akpụ ngwa ngwa
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Mpempe akwụkwọ na-eme mkpọtụ
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Hama isi NiTi ngwa ngwa
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Weingart pllers
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Nko na-akpụ akpụ
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Mpempe mgbodo na-ewepụ ngwa ngwa ( kwụ ọtọ)
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Mpempe mgbodo na-ewepu ngwa ngwa (Angled)
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Micro embankment na-ekpo ọkụ na-akpụ ngwa ngwa
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Ọkpụkpọ kwụ ọtọ na-akpụ mkpachị
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Mpempe mmiri na-adaba akwa
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Ọkpụkpọ kwụ ọtọ na-akpụ mkpachị