Warning: file_put_contents(/home/www/wwwroot/zidian/69228.com/cache/e170790b2747f1720b64da466f9cc8c6.txt): failed to open stream: No space left on device in /home/www/wwwroot/zidian/69228.com/index.php on line 55 国产AV一区最新精品,67pao国产在线观看
Dushanzi asphalt was modified by blending resin and rubber polymers.The experiments of polymers blending ratios were arranged by uniform design method. 采用均勻設計法安排試驗,通過加入不同比例的樹脂類聚合物及橡膠類聚合物對獨山子煉油廠的瀝青進行了改性。