I need distractions. I need to amuse myself so I won't keep thinking about things...我需要分散我的注意力。需要消遣一下，让自己不去想这样那样的事。Little things amuse little minds.小人志卑。Put a selection of baby toys in his cot to amuse him if he wak...
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...