Thus, the utility model can balance the internal pressure and the external pressure of the porous material to reach the purpose of reducing impact of pressure to the porous material.
如此一来，可平衡多孔材料的内外压力，达到降低压力对 多孔材料的冲击的目的。
Thus, the utility model can balance the internal pressure and the external pressure of the porous material to reach the purpose of reducing impact of pressure to the porous material.
如此一来，可平衡多孔材料的内外压力，达到降低压力对 多孔材料的冲击的目的。
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