Warning: file_put_contents(): Only 0 of 6709 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/201990.com/index.php on line 55 overburden separated strata是什么意思，overburden separated strata的翻译，overburden separated strata音标、读音、用法和例句_耀久九英英词典
The mechanics model of the pressure balance arch in overburden is founded, that is necessary to calculate the sizes of separated strata rock layers. 建立覆岩内压力平衡拱迹线的力学模型，计算离层岩板的尺寸；