Pipa uamea fa'aletonu Fa'apa'au uamea

O paipa u'amea fa'aletonu ose ta'u masani mo paipa u'amea lamolemole ma fa'alava fa'alava e ese mai paipa lapotopoto. O se paipa u'amea vaega tau tamaoaiga. E aofia ai contours non-circular cross-sectional, mafiafia puipui toniga, mafiafia puipui fesuiaʻi, fesuiaʻi le lautele ma fesuiaiga mafiafia puipui i luga o le umi, symmetrical ma asymmetrical cross-vaega, ma isi E pei o sikuea, rectangle, cone, trapezoid, spiral, etc. O paipa uʻamea faʻapitoa faʻapitoa e mafai ona sili atu ona faʻafetaui i le tulaga faʻapitoa o le faʻaogaina o tulaga, faʻasaoina uʻamea ma faʻaleleia le gaosiga o galuega o vaega gaosiga.