| 摘要 |
<p>Y-section fine-denier synthetic polymer filament.. M2A. Having uniformly along its length, A Y-cross-section, r1 radius of curvature of the point of each rib, R the radius curvature of the circle circumscribing the section f the length of the straight side of the rib and R' and radius of the inscribed circle, so chose that r1 /R and f/R lie in a bounded region and such that R/R' is 2.7-5.0. r1/R may be 0.05-0.24; f/R may be 0.28-0.8. Angle A between the two sides of a rib is 0-36, and the angle between all the ribs being substantially 120.</p> |
