短語詞組短語borehole e diameter 井徑borehole diameter enlargement coefficient 井徑擴大系數(shù)eighteen arm borehole diameter 臂井徑borehole diameter enlargement rate 井徑擴大率borehole diameter enlargement 井徑擴大CAL borehole diameter 井徑borehole diameter enlargement ratio 井徑擴大率borehole diameter expanding 井徑擴大thirty six arm borehole diameter 臂井徑 返回 borehole diameter