Effects of Gas-assisted Slip on Extrusion Die Swell of Gas-assisted Die Extrusion Process ofPolymeric Profiles#br#
闫丽, 周国发, 周勇飞, 郭吉林
China Plastics . 2007, (7): 60 -64 .  DOI: 10.19491/j.issn.1001-9278.2007.07.014