In 1969 a ( 51 mm ) bituminous concrete overlay was placed on the concrete deck.1969年在混凝土板上铺设了51mm厚的沥青混凝土铺装层.Of all the workers in the country bituminous miners probably had best grounds for discontent.在全国所有的工人中,可能烟煤矿工不满...
Stable size and good filter efficiency of the bituminous.尺寸稳定,沥青浸渍性好.As a result, the reduction efficiency of charcoal, anthracitic and bituminous are better than pulverized coke.结果表明:木炭 、 无烟煤、烟煤作为还原剂还原效果明显优于焦粉.The ichth...