Methods300case were scanned by contrast-enhanced CT with HPS and the different inject speed, total volume, scan delay time and patient's conditions were analyzed comprehensively.
方法对300例患者用高压注射器进行螺旋CT增强扫描，对不同的注射速度、总量、扫描延迟时间及患者的状况作综合性分析。
Step3 inject remain 1/3 of product. According to product molding speed and pressure lower than that of step2 To prevent flash speed and pressure should decrease but it can't shot short.
第三段是注射余下的 1/3 段，其速度和压力根据产品的需要，一般是小于第二段，速度和压力存在于一 个往下降的过程。主要是为了防止产品毛边的产生，但同时又必须把产品充填饱满。
Step4 section: Some injection machines have step5, step6 which are same as former molding speed and pressure this step should diminish and inject once more.
第四段：一般有机台还有第五，第六段，这段的成型速度和压力相同前，都存在两段一个递减过程。其作用都是起到一个再次充满的作用。
Step4 section: Some injection machines have step5, step6 which are same as former molding speed and pressure this step should diminish and inject once more.
第四段：一般有机台还有第五，第六段，这段的成型速度和压力相同前，都存在两段一个递减过程。其作用都是起到一个再次充满的作用。
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