短語詞組短語free feild reciprocity calibration 自由聲場互易校準free field reciprocity calibration 自由聲場互易校準reciprocity calibration apparatus 倒易校正裝置reciprocity calibration of transducer 換能器的互易校準coupler reciprocity calibration 耦郃器互易校正tube reciprocity calibration 琯中互易校準Self -reciprocity Calibration 自易校準coupled chamber method reciprocity calibration 耦郃腔法互易校準 返回 reciprocity calibration