Warning: file_put_contents(): Only 0 of 5441 bytes written, possibly out of free disk space in /www/wwwroot/ppbbu/5356789.com/index.php on line 55 bottom impermeable layer是什么意思，bottom impermeable layer的翻译，bottom impermeable layer音标、读音、用法和例句_橘子朗文词典
When confined aquifer under the bottom of the pit, the foundation excavation will reduce the thickness of overlying impermeable layer. 在基坑底部以下存在承壓水層的情況下，基坑開挖減少含水層上覆不透水層的厚度。