Warning: file_put_contents(): Only 0 of 7768 bytes written, possibly out of free disk space in /home/www/wwwroot/ndsq.cn/index.php on line 55 bastard coal是什么意思，bastard coal的翻译，bastard coal音标、读音、用法和例句_開心英語字典_柠咚词
The percussive speed of the material is adjustable to obtain different impact so as to separate bastard coal with different hardness. 物料的撞擊速度可以調整，以獲得不同的沖擊力，對不同硬度的煤矸進行分 離。 ip.com