油有浮在水上的特性.Oil has the property of floating on water.然而,五大湖流域的州地在水上的特殊问题仍继续存在.Great Lakes states continue to have their own unique water problems, however.油是漂浮在水上的,这样,潜艇就有了浮力.Oil floats on water and so you get the buoyanc...
炉箅子是高炉热风炉的重要部件之一.Furnace grate is a main part of hot blast stove.用于高炉 、 热风炉砌筑刚玉砖、莫来石砖 、 硅线石砖 、 低蠕变高铝砖.Used for corundum bricks, mullite bricks, silicate bricks masonry in blast furnaces, hot air stoves.热风炉是高炉系统中非常重要的设备之一...