By the 1930s the wristwatch had almost completely supplanted the pocket watch.到了20世纪30年代，手表几乎完全取代了怀表。He glanced at his wristwatch. "I suppose we'd better make a move."他看一眼手表说：“我想我们最好动身吧。”It was so quiet I could hear...
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...
Micro - landform and micro - climate could exert great influence on conductor icing.微地形微气候对导线覆冰有很重大的影响.Condition of special landform, grade water natural resources, suit piscatorial development.非凡的地形 、 优质的水资源条件, 适合渔业的发展....