backings

The results show that the influences of various backings on the acoustic characteristics of anechoic coating are obviously different.

结果表明，背衬对吸声覆盖层吸声性能影响具有明显特性。

Then they are carefully ironed flat.Second, the straw is woven and glued to card board backings according to the different colors and textures.

然后其熨开，编好草编按质地粘合在木板上。