Analyzed press technology characteristics of vent-windows of the car side board, designed a lancing-drawing compound die.
分析了车厢侧板零件通风窗冲压加工的工艺特点，设计了一副针对该零件加工的切口拉伸复合模。
Windows and doors should be opened in order to vent the blast if detonation should occur.
窗户和门应保持打开，以备爆炸发生后迅速消散烟雾。
Windows and doors should be opened in order to vent the blast if detonation should occur.
窗户和门应保持打开，以备爆炸发生后迅速消散烟雾。
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