The results showed that the extrusion speed had effects on the irregularity of cross section, surface morphology, profile degree, sonic orientation and compactness of PAN fiber.
结果表明：喷丝速度对PAN纤维截面的规整性、表面形貌、异形度、声速取向和致密性等均会产生影响。
2
The problem of the first importance in automatically controlling the profile and flatness of cold rolled steel strip is how to measure continuously on the irregularity of elongation in the strip.