铸

Under the scanning electron microscope , for the first time we compare and study both the coalified tracheids through chemical maceration and permineralized tracheid lumen casts. This method reveals the microstructures of wall and perforations of G-type tracheids: 1 The lignified layer of secondary wall is composed of uneven material and further divided into S〓, S〓, S〓 layers; with the smooth enclosing wall, the perforation is internally dumbbell-shaped; 2 In Huia gracilis, the enclosing wall of tracheidal perforation contracts and possesses secondary perforations. The perforation has thickened border facing the tracheid lumen.

本文首次在扫描电子显微镜下对比研究经化学浸解获得的碳质管胞和矿化的管胞腔铸体，明确揭示出了G-型管胞壁层和穿孔的显微结构：1）Hsüa reflexa次生壁木质化层的组成不均一，分为S〓、S〓和S〓层；穿孔腔为哑铃形，腔壁光滑；2）Huia gracilis的穿孔腔收缩，腔壁上发育次级穿孔，孔口具有边缘加厚。

Base on the weldability tests , the repair welding procedures of weari-resistant cast steel (abrasion-plates) have been made up , The results show that satisfying repair welding quality can be attained with such welding conditions as the low hydrogenous alkalescent welding rod , preheating and slow cooling , strictly maint.

通过对其焊接性能的试验研究，制定了该类铸钢件的补焊工艺：低氢型碱性焊条，预热与缓冷相结合的工艺措施，严格控制层间温度(250～300℃)及焊接工艺规范，可获得满意的修复质量。

The liquid metal pressure and the tow speed were calculated according to the hydromechanics model as well as the heat transfer model. The results indicate that the technology parameter is appropriate,and the ?

结果表明：根据模型确定的参数是合适的，并在铸型温度为690～780℃、冷却距离为50mm、牵引速度为1.1mm/s的工艺条件下获得了！

Effects of P modification on primary Si in hypereutectic Al-Si die casting alloy with different cooling rates were investigated.

以过共晶压铸铝合金为对象，研究了P变质对不同冷却速度下初晶Si组织的影响。发现P变质处理前后随冷却速度的增加，初晶Si尺寸减小的变化趋势十分相似，并且都存在一个明显的突变区域。

Henrik Ibsen said,"It is your greatest duty to make yourself out."

易卜生说："你的最大责任是把你这块材料铸成器。"

The kylin can be found in the emperor's dwellings and gardens in the Imperial Palace and the Summer Palace in Beijing, either made of copper or stone.

在北京的故宫和颐和园等皇帝的住处和花园里，都能见到麒麟，有铜铸的，也有石雕的。

Main craft: The etching, the pressure to flush, the note paint, silk India, the drop rubber, to imitate the enamel, the zinc base alloy compression casting and so on.

主要工艺：蚀刻、压冲、注漆、丝印、滴胶、仿珐琅、锌合金压铸等。

A effective process of purification treatment of high silicon cast steel melted by MF induction furnace was obtained.

得到了中频感应电炉熔炼高硅铸钢的有效钢液净化工艺。

The water filter is made of cast iron,cast steel,brass and stainless steel with small figure.It is indurate and easy to install.

本过滤器系列产品由铸铁、铸钢、黄铜、不锈钢等材质制成，具有体形小、安装方便、坚固耐用。

It is suggested to apply the principle of effective gravity and equivalent pressure head to calculate the rotational speed and ingate area in the processing of grinding ball by centrifugal casting.

在离心铸球工艺中，可应用有效重度和等效压头原理计算转速和内浇口断面积。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。