“…where, A1 is the length of preheating tank, cm; A2 is the width of preheating tank, cm; △H is the liquid level drop caused by sizing, cm; C is the slurry concentration; r is the specific gravity of slurry, g/cm 3 ; N is the total number of yarns; Nt is yarn's count number, tex; L is the set length, m; W0 is the moisture regain of yarn.…”