| 摘要 |
An underlay sheet and a method for the manufacture thereof. The underlay sheet is substantially a uniform structure, including two layers connected to each other, the first and upper layer (3) being a film layer, and the second and lower layer (2) being a sub-layer substantially formed of one material and including a plate-like part and projections (5) arranged on the lower surface of the plate-like part at a distance from each other and in accordance with a predetermined pattern, such that grooves for the air flow are formed between the projections. |
