Liquids are usually transported in

Liquids are usually transported in circular pipes because pipes with a circular cross-section can
withstand large pressure differences between the inside and the outside without undergoing any distortion.

Hasil (Bahasa Indonesia) 1:

Cairan yang biasanya diangkut di melingkar pipa karena pipa dengan penampang melingkar dapat menahan tekanan besar perbedaan antara bagian dalam dan luar tanpa mengalami distorsi apapun.