the maximal pore radium .7 μm, the median pore radii .9-. μm and loose layer of ～8 m thickness encountered;
the maximal pore radium .7 μm, the median pore radii .9-. μm and loose layer of ～8 m thickness encountered;
最大孔隙半径 .7μm ,中值半径 .9～ . μm ,有厚约 8m的疏松岩层 ;