Warning: file_put_contents(): Only 0 of 6232 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/001308.com/index.php on line 55 gravelly clay例句_gravelly clay英汉例句_gravelly clay双解例句_零食美味英文词典
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。