four-electrode pattern
... four-effect evaporator 四效蒸发器 four-electrode pattern 四极组合 four-funnel guide frame 有四个漏斗形导向承口的导向架 ...
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实验结果表明，在不同组合和激励条件下，圆弧阵具有声波测井的单极子、偶极子和四极子声源的辐射特征。
The results show that the annular array in different combination and excitation condition has radiation characteristics of monopole, dipole and quadrupole of acoustic logging.
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