图26 镇江船山矿(苏17井)水氡5日均值曲线
Fig.26 Curves for 5-day mean value of radon content in water at
Chuanshan Mine (No.17 well of Suzhou), Zhengjiang
1977-1979 仪器未测定,故单位为直接读数(格/分),1980年后仪器标定,
纵坐标为绝对值,单位为贝可。下图27,28,30同。