叠合结构为聚酯针刺棉为底层，聚乙烯膜为中层，聚酯热轧无纺布为上层；
The superposed structure has needle punched polyester wool as bottom layer, polyethylene film as the middle layer and hot rolled non-woven polyester fabric as the upper layer.
叠合结构为聚酯针刺棉为底层，聚乙烯膜为中层，聚酯热轧无纺布为上层；
The superposed structure has needle punched polyester wool as bottom layer, polyethylene film as the middle layer and hot rolled non-woven polyester fabric as the upper layer.
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