它是一种多功能、多用途包装机型，集薄膜位伸成型、装填物料、抽真空、热封、分切等功能于一体，在一台机械设备上具备了一条包装生产线的功能。
It congregates these functions such as stretching loading materiel vacuuming hot sealing and cutting on one single machine thus it can possess the functions as a complete packing line.
文章详细阐述了催化裂化重整车间抽提系统、预加氢系统、催化重整部分换热设备管束腐蚀情况。
The corrosion of heat exchanger tubes in extraction system, pre-treatment system and reforming system are described in detail.
对所得的产品用热甲苯进行抽提，并用TEM、IR、XPS等手段进行分析。
The products were extracted by hot toluene and characterized by TEM, IR and XPS.
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