chuisuchanwushiruohechengzhangqilaide？

热塑性树脂经挤出或打针成型获得的管状塑料型坯，趁热（或加热到硬化状况），置于对开模中，闭模后当即在型坯内通入紧缩氛围，使塑料型坯吹胀而紧贴在模具内壁上，经冷却脱模，即获得各类中空成品。

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