缩孔和缩松是球墨铸铁特有的废品现象.Shrinkage and dispersed shrinkage are the special waster of ductile iron.分析了缩孔产生的原因,消泡剂的作用机理并介绍了预防缩孔的措施.The reasons of crater and action mechanisms of antifoaming agents were analysized.取消冷冒口后,缩孔、缩松问题成功...
The wind dislodged one or two tiles from the roof.大风从屋顶上刮下了一两片瓦来。Erodible soil fractions are usually dislodged from projections and trapped in depression.可冲蚀土壤部分经常从凸出物剥蚀并降落于洼地.In the exertion Tompkins' hat had becom...
...leaves that are often downy underneath.底部常常多茸毛的树叶A kitten's fur is downy.小猫的毛很柔软....the white downy bodies of two chicks.两只小鸡仔白色的毛茸茸的身体It also inhibited the occurrence of downy mildew and Erwinia carotovora.对田间大白...
He completed his BSc in chemistry in 1934.他1934年获得了化学专业的理学士学位。He has a BSc in Chemistry.他是化学理科学士.Clean the fan plenum filters for all of the BSC cabinets.清除BSC机柜所有风扇组的过滤网....