Mashiinka samaynta biimetallic-ka ee bimetallic extruded tuubada samaynta waxa loo isticmaalaa in lagu sameeyo tuubada finned oo isku xidhan oo leh xidhid fin-to-tuubo ah oo aad u fiican oo bixisa hawlkarnimo gaar ah iyo cimri dheer.Haddi ay noqoto adeeg qallafsan, heerkul sare, ama deegaan daxalaysan, tuubada fin ee extruded ayaa ah ikhtiyaarka ugu fiican ee codsiyada kulaylka.