When a custodian couldn 't water the grass in the entire Stonehenge area ( as was usually done ) due to the short hose the grass failed to grow in the unwatered area revealing depressions in the ground .

因为水管不够长，看守人不能浇到整个 巨石阵区域的草（就像 之前每次做的那样），没有 浇到水的区域长 不出草来， 显得 这 片地面比较萧条。

Analysis and prevent of unwatered back for pump reverse circulation sand pump

泵 吸反循环砂石泵 不 返 水 原因分析与防治