Two-EC双变量误差修正twonum.二；两个two-side horizontal boring transfer machine双面卧式镗孔组合机床two-frequency superimpose addressing scheme双频重叠选址法two-point multi-section correction method两点多段校正法two-dimnensional doppler color flow imaging二维多普勒彩色血流显像two-spring-two-freedom vibration system二自由度两弹簧振子系统two-tuple linguistic information proceasing层次分析法Two-segment connection pole for transformer配电变压器两段式导电杆two-way vioce-frequency transmission path双向音频传输通路Two dimensional KdV-Burgers-type equation二维KdV-Burgers型方程two-horizontal-reel trailed potato digger双水平转轮牵引式马铃薯挖掘机