粗大

Using of optical microscopy, X-ray diffraction, transmission electron microscopy, hardness and tensile testing, the effect of thermal exposure at high temperatures on the microstructures and of high-temperature tensile properties of rapidly solidified AlCrYZr have been studied. The results show that there are two main phases,Al20Cr2Y(cubic, a=1.437 nm) and DO23Al3Zr(terganal, a=0.4 013 nm , c= 1.732 nm), in the as-solidified alloy. The Al20Cr2Y phase can maintain its cubic structure at 500℃, but the particles coarsen remarkably and even become lumpish. In coarse lumpish Al20Cr2Y phase the plane faults and twin structures exist.

摘 要：采用金相、 X射线衍射、透射电镜、硬度测定和拉伸试验研究了高温热暴露对快速凝固AlCrYZr合金显微组织影响和高温下力学性能的热稳定性，结果表明，快速凝固AlCrYZr合金主要第二相为Al20Cr2Y(立方，a=1.437nm)和DO23Al3Zr(正方，a=0.401 3nm， c=1.732nm)，Al20Cr2Y在500℃热暴露尚能保持其立方结构，但质点明显粗化，甚至块状化，在粗大的Al20Cr2Y相中存在有层错和孪晶结构。

The results showed the specimens by vacuum sintering had a typical Widmannstatten microstructure, which possessed coarser prior β-grains and secondary platelet α+β-phase, but the alloy had a more microporosity and a lower tensile strength and ductility. After HIP treatment, prior β-grains and secondary platelet α+β-phase became fine and uniform, and the alloy possessed a less microporosity and a higher tensile strength and ductility.

结果表明：真空烧结Ti-6Al-4V合金具有典型的魏氏体组织，其初始的β晶粒粗大，β晶粒内为次生片状α和薄β相片，空隙较多，合金的强度和塑性较低；合金经热等静压处理后，组织明显细化且均匀，空隙很少或几乎没有，从而强度和塑性都有所提高。

The gross anatomy of trigeminal nerve rat was similar to human, but the rat ophthalmic nerve combined with the maxillary nerve formed one long nerve trunk that reach to the orbital apex. The trigeminal nerve of rat could be showed clearly on MR images.

大鼠的三叉神经解剖结构与人类相似，主要不同是大鼠三叉神经眼支与上颌神经合为一个神经干，达眶尖处分开；大鼠的三叉神经较粗大，在1.5T MR成像系统可以被清楚地显示。

The existence of large second phases is found to be beneficial to nucleation.

粗大的第二相粒子对再结晶形核具有促进作用。

Large pores of the skin is oily a major feature of excessive secretion of oil will expand the fat gland ducts, so that the pores appear larger, particularly the cheeks, nose, etc. of the significantly larger pores.

毛孔粗大是油性皮肤的一大特点，油脂分泌过多会扩大脂腺导管，从而使毛孔看上去比较大，尤其是双颊、鼻翼等处的毛孔显的更大些。

The floor of the chapel, which is on a level with the top of the rock, is covered with coarse mosaics.

地板的小教堂，这是一个同级别的顶部岩石，是布满粗大的马赛克。

Small graceful palm with reedlike stems and leaf bases clothed with loose coarse fibers.

芦苇状茎，基部为粗大的纤维所包的一种小型的美丽棕竹。

A small dainty foot or one down at the pastern are not functional.

阿拉斯加的脚必须粗大并且结实。踝部可能会有稍微的弯曲。

Results: Large number of immunoreactive fibres was detected in lamina propria and muscularis mucosae. Strong staining of ganglion cells in the Auerbach's and the Meissner's plexus were observed on the normal specimens. There was very little or no immunoreactive fibre in the lamina propria and muscularis mucosae of the aganglionic bowel. However there was strong immunoreactivity in the perineurium of the hypertrophic nerve trunks in the submucosal and intramural layers of aganglionic segments.

结果： 正常肠段的粘膜固有层和粘膜肌层中有大量的P75NGFR阳性纤维，粘膜下和肌间神经丛中神经节细胞表现为P75NGFR强阳性，痉挛段肠管粘膜固有层和粘膜肌层中P75NGFR阳性纤维明显减少或缺如，粘膜下和肌间粗大神经纤维的神经束膜表现为P75NGFR强阳性，象一个环包绕在周围。

Strong staining of ganglion cells in the Auerbach's and the Meissner's plexus were observed on the normal specimens. There was very little or no immunoreactive fibre in the lamina propria and muscularis mucosae of the aganglionic bowel. However there was strong immunoreactivity in the perineurium of the hypertrophic nerve trunks in the submucosal and intramural layers of aganglionic segments.

结果： 正常肠段的粘膜固有层和粘膜肌层中有大量的P75NGFR阳性纤维，粘膜下和肌间神经丛中神经节细胞表现为P75NGFR强阳性，痉挛段肠管粘膜固有层和粘膜肌层中P75NGFR阳性纤维明显减少或缺如，粘膜下和肌间粗大神经纤维的神经束膜表现为P75NGFR强阳性，象一个环包绕在周围。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。