短语词组短语excentricity xctr 偏心度numerieal excentricity 偏心率manipul átor excentricity 离心率控点úchyt excentricity 离心率控点excentricity of drilling pipe 钻具偏心度;钻具偏疼度excentricity measuring instrument 偏心度测量仪 返回 excentricity