Pengaruh aditif penambahan konsentrasi serat fiber bakteri selulosa pada aliran turbulen crude oil dalam pipa spiral P/Di 7.6 = The additives influence of the addition of bacterial cellulose fiber suspensions in crude oil turbulent flow at spiral pipe P/Di 7.6 / Rendi Rezkita ([Fakultas Teknik Universitas Indonesia, Fakultas Teknik Universitas Indonesia], 2014)