The layered sheets each comprises a base sheet and a polyurethane foam layer.

本发明的层叠片包括基材片和聚氨酯发泡层。

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Resilient floor coverings. Polyvinyl chloride floor coverings with foam layer. Specification.

弹性地板覆盖物。有泡沫层的聚氯乙烯弹性地板覆盖物。规范。

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So a certain kind of antifoaming agent is needed to lower the foam layer and prohibit from foaming.

因此需使用消泡剂来降低泡沫层的高度，并抑制泡沫的产生。

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The Maya poured the chocolate drink back and forth between two containers so that the liquid had a layer of bubbles,or foam.

VOA: special.2010.02.17

Over that, they attach a half-inch layer of foam to give the structure some yield for little climbers.

WSJ: If Kids Can Play, Will Mom Shop?

Smaller bubbles make for a stable, uniform layer of foam.

FORBES: The Science of Small

In Afghanistan, the foam would be wrapped in a low-tech layer of chicken wire, then covered in a thin layer of concrete.

BBC: Aftermath of 1998 quake in northern Afghanistan