有關backings的精選大全

用backings造句子,“backings”造句
Theresonantcharacteristicsiscalculatedandanalyzedindifferentbackings.Theresultsshowthattheinfluencesofvariousbackingsontheacousticcharacteristicsofanechoiccoatingareobviouslydifferent.Theacousticrefle...
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