Ọkụ na-egbuke egbuke
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Nkenke n'ime na n'èzí tube na-egbuke egbuke
Nkenke na-egbuke egbuke tube bụ ụdị elu nkenke ígwè tube ihe mgbe emechara ịbịaru ma ọ bụ oyi Rolling. N'ihi na ọ dịghị oyi akwa oxide n'ime na n'èzí mgbidi nke ziri ezi na-egbuke egbuke tube, ọ dịghị ntapu n'okpuru elu mgbali, elu nkenke, elu imecha, oyi ekwe na-enweghị deformation, flaring, flattening na-enweghị cracks na na, ọ bụ tumadi na-eji maka mmepụta nke pneumatic ma ọ bụ hydraulic components.