The flow behaviour of two polystyrene melts, styron 498 and styron 492J, in extrusion were investigated by using a capillary rheometer.是什么意思_The flow behaviour of two polystyrene melts, styron 498 and styron 492J, in extrusion were investigated by using a capillary rheometer.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句