Ọkụ pụrụ iche
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Igwe anaghị agba nchara elliptic flat elliptical tube nwere uzo nwere ụdị fan
A na-eji tubes a kpụrụ akpụ mee ihe n'ọtụtụ akụkụ dị iche iche, ngwaọrụ na akụkụ igwe.E jiri ya tụnyere tube gburugburu, tube nke nwere ụdị pụrụ iche n'ozuzu nwere oge ka ukwuu nke inertia na akụkụ modulus, nwere nnukwu agbagọ na nguzogide torsional, nwere ike belata ịdị arọ nke ihe owuwu ahụ, chekwaa ígwè.