The PVC comes down here. Maybe a little corrugated sheet metal as a radiator here.

PVC从这儿下来，也许一点褶皱的金属片作散热器放这儿。

Could be corrugated metal, a fabric or plastic.

可以是波纹金属、织物或塑料。

Our house was amongst clusters of houses made mostly of wood and corrugated metal sheets.

我们的房子位于主要由木头和波纹金属板制成的房屋群中。