Rescuers are preparing to blast the barrier of the swelling dammed lake at Tangjiashan near Beichuan County with dynamite.
北川县城附近的唐家山堰塞湖水位不断上涨，抢险人员准备实施爆破、分流排水。
2
Because of high alkaline earth metal content, the reduction swelling of Baotou pellet makes blast furnace operation very difficult.
包头白云鄂博矿碱金属含量高，球团还原膨胀率高，给高炉冶炼带来很大困难。
3
Because of the large-scale blast furnace, the request on pellets are constantly increasing, To get lower reduction swelling and quality of pellets is one of the pursuit of metallurgy workers.