真(zhen)(zhen)空(kong)(kong)(kong)(kong)包(bao)裝(zhuang)材料常(chang)用雙層復合(he)薄(bo)膜(mo)或三層鋁(lv)薄(bo)復合(he)薄(bo)膜(mo)制成的三道封口包(bao)裝(zhuang)袋。真(zhen)(zhen)空(kong)(kong)(kong)(kong)包(bao)裝(zhuang)機常(chang)用腔式(shi)和(he)外抽式(shi)二(er)種(zhong)機型。我(wo)國的真(zhen)(zhen)空(kong)(kong)(kong)(kong)包(bao)裝(zhuang)技(ji)(ji)術是在(zai)八十年代(dai)(dai)初(chu)期發展起來(lai)的，而真(zhen)(zhen)空(kong)(kong)(kong)(kong)充氣包(bao)裝(zhuang)技(ji)(ji)術在(zai)九十年代(dai)(dai)初(chu)期開始(shi)使(shi)用。