![backings造句怎么写]( "backings造句怎么写")
- Theresonantcharacteristicsiscalculatedandanalyzedindifferentbackings.Theresultsshowthattheinfluencesofvariousbackingsontheacousticcharacteristicsofanechoiccoatingareobviouslydifferent.Theacousticreflectioncharacteristicsoftheunderwateranechoiccoating...
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