Osisi corrugated bụ ihe nrapado nke multi-layer, nke ọ dịkarịa ala mejupụtara oyi akwa nke sanwichi isi akwụkwọ (nke a na-akpọkarị pit zhang, akwụkwọ mpempe akwụkwọ, isi akwụkwọ mpempe akwụkwọ, akwụkwọ mpempe akwụkwọ) na akwa kaadiboodu (nke a makwaara dị ka). " igbe igbe ...
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