用backings造句子，“backings”造句
來源：國語幫 1.88W
The acoustic reflection characteristics of the underwater anechoic coating with cavity are researched in different backings and cavity types, and effects of structure are also analyzed.
The resonant characteristics is calculated and analyzed in different backings.
The results show that the influences of various backings on the acoustic characteristics of anechoic coating are obviously different.
