Warning: file_put_contents(/www/wwwroot/ppbbu/3402.cn/cache/ea289e7a8443f77b40ab17df24e09b87.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/3402.cn/index.php on line 58 tunnel kiln reduction例句_tunnel kiln reduction英汉例句_tunnel kiln reduction双解例句_咖味滋双解词典
The iron powder quality is ensured through tunnel kiln reduction and second reduction by using iron scale of high grade as raw material. 以优质铁鳞为原料,加强隧道窑和二次精还原工艺技术管理,确保铁粉质量。