tegur, mille väärtus arvutatakse seosest β = [1 - (dc2/D2)]0,5, kus dc on koonuse läbimõõt koonuseserva tasapinnas, D on koonustoru läbimõõt betaservas, factor whose value is calculated from the relation β = [1 - (dc2/D2)]0,5, where dc is the diameter of the cone at the plane of the cone edge, and D is the diameter of the pipe at the beta edge