Warning: file_put_contents(/www/wwwroot/ppbbu/laei.cn/cache/adc1fdaa49cefd201ff4c53d37f06a63.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/laei.cn/index.php on line 58 gravelly clay例句_gravelly clay英汉例句_gravelly clay双解例句_按摩法牛津词典
In this paper, the effect of water scouring to the filter about clay and gravelly soil is analyzed by using the crack scour tests. 本文结合湖南隆回渗滤取水工程，采用调查、试验、分析、研究等方法，对滤层淤塞的影响因素、反冲洗改善天然滤层渗透性的试验进行研究。