用3×3造句子，“3×3”造句

6、AN ADJUSTABLE 2×2 FIBER COUPLER USING NONPLANER 3×3 FIBER COUPLER

3、A Three-wavelength-division-multiplexer by Using Three 3×3 All-fiber Couplers

1、A 3×3 Matrix Spectral Problem and Its Darboux Transformation;

5、Interaction of Short Pulses in a One-dimension 3×3 Nonlinear System

2、Possible Spectrums of 3×3 upper Triangular Operator Matrices;

4、Vibration measurements based on the phase tracking of a fiber 3×3 coupler interferometer