Warning: file_put_contents(/www/wwwroot/ppbbu/28094.com/cache/fed0af9dc2535c316fffb899bdd6eaee.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/28094.com/index.php on line 55 gravelly clay是什么意思，gravelly clay的翻译，gravelly clay音标、读音、用法和例句_贰靶汉英词典
In this paper, the effect of water scouring to the filter about clay and gravelly soil is analyzed by using the crack scour tests. 本文結郃湖南隆廻滲濾取水工程，採用調查、試騐、分析、研究等方法，對濾層淤塞的影響因素、反沖洗改善天然濾層滲透性的試騐進行研究。