薄壁

The paper describes in detail the four factors resulting in the corrosion of buried steel pipeline,that is environment,corrosion control effectiveness,material of pipe steel,and stress of pipeline,presents a total statistics on petroleum asphalt,coal-tar enemal,extruded polyethylene coating,PE tape,FBE,and multiple coating system and the individual percentage of theirs per years during 1990-1995,and points out that the selection of all kinds of coatings,being different behaviors,should be defermined according to the geological conditions and corrosive environments along pipeline route.

阐述了埋地钢质管道发生腐蚀的四个影响因素，即环境、腐蚀防护效果、钢管材质和制造工艺以及应力水平，统计了1990-1995年石油沥青、煤焦油瓷漆、挤塑聚乙烯、PE胶带、FBE、复合覆盖层的涂敷量，指出防腐覆盖层各有优缺点，应根据管道线路的地质条件、腐蚀环境等而定，目前应建立防腐层的综合评价方法以解决防腐覆盖层的设计问题，同时还应对钢管表面处理、现场补口加以重视，在采用高强薄壁钢材时应考虑壁厚要求。

They are common in many situations, for example as gland cells and epidermal cells, and in xylem and phloem parenchyma, where they are concerned with active loading and unloading of vessels and sieve tubes.

许多情况下都有传递细胞发挥作用，例如：腺细胞和表皮细胞，还有木质部和韧皮部的薄壁细胞，该处导管和筛管的主动装填和排空都与传递细胞有关。

Of thick bark usually located in windward habitats. The phloem color was related to the inclusion and contents of the phloem cells, especially to the tannin and resin of the phloem parenchyma and their oxidation.

但是韧皮部的颜色则与细胞内含物的多少和成分有关，尤其是韧皮薄壁细胞内的丹宁和树脂的含量以及它们在空气中的氧化作用有关。

The main products has:§105mm -§1000mm large, medium and small diameter concrete, granite, marble, diamond saw blade;§20mm -§300mm hollow thin-walled diamond bit; various sizes of single-phase, three-phase drill reinforced concrete and concrete strength Qing Java machine, concrete pavement cutting machine and vibration rammers, petrol rammers, reinforcing steel cutting machine, bending machine, tamping machines and other frogs.

主要产品有：ф105mm--ф1000mm大、中、小直径混凝土、花岗岩、大理石、金刚石锯片；ф20mm--ф300mm金刚石空心薄壁钻头；各种规格单相、三相钢筋混凝土钻孔机以及混凝土强力清渣机，混凝土路面切割机和振动冲击夯，汽油冲击夯、钢筋切断机、弯曲机、蛙夯机等。

Secondly, it summarizes the development of cold-formed sections and latest trend about stability of cold-formed beams and purlins. Finally, some possible improvements in stability of cold-formed beams and purlins are anticipated.

其中普通钢结构主要指采用大截面和厚板的结构(因表面涂有防锈漆，俗称&红钢&的结构)；而轻钢结构则主要指以轻型H型钢或冷弯薄壁型钢作为承重骨架，用轻型板材作围护的结构(图 1 )。

Cytoplasmic actin microfilament systems were localized in the freshly isolated onion protoplasts of bulb parenchyma cells using TRITC labelled phalloidin probe in the present study.

使用四甲基罗丹明标记的鬼笔环碱探针，以新分离的洋葱鳞茎薄壁细胞原生质体为材料，观察了细胞胞质肌动蛋白微丝骨架的结构与形态。

Then the algorithm was used to get the seven parameters of viscosity model of W-Ni-Fe heavy alloy and 316L stainless steel feedstock, which provide the necessary material data for quality forecast of mold core part made of stainless steel and heavy alloy tungsten ball, and for optimal design of mold and process parameters, which establishes the foundation of material database of MIM. In the research of visual simulation software development, in order to build the software system model and flow analysis algorithm based on Cross-WLF viscosity model, and realize functions such as pre-processor, solver, parameter regress, data management, graph operations, some advanced software methods as OOSE (Object Oriented Software Engineering) and UML were applied to set up user model, static model and dynamic model of MIM simulation software. These models describe system function, event flow, structure and relation of classes, object interaction, structure of database and I/O file format.

在MIM可视化仿真软件开发方面，为了建立软件系统模型及基于Cross-WLF粘度模型的流动分析算法，实现软件的前处理、求解器、参数拟合、数据管理和图形操作等功能，将面向对象软件工程与统一建模语言技术首次引入到MIM仿真软件的设计开发中，建立了软件的用户模型、静态模型和动态模型，描述了系统的功能需求、事件流程、类的结构与关系、对象之间的通信、数据库结构和输入输出文件格式等，用Visual C++与Delphi开发工具编码实现了2维MIM充模流动过程仿真软件，方便了对薄壁零件的质量预测以及模具和工艺参数的优化设计。

Solution of iodine reaction showed purple-brown, reddish violet.

结果 性状主要特征为有时具姜样气味；显微主要特征为多糖类团块、厚壁细胞、薄壁细胞、草酸钙针晶束及姜的淀粉粒、梯纹导管、纤维、油细胞等；碘试液反应呈紫棕、红紫色。

Mycelium and spores enter wounds and move through the xylem and into the ray parenchyma cells.

菌丝体和孢子进入伤口并通过木质部移动并扩散到薄壁组织细胞。

The callus started to produce near the surface of the wound from the remaining immature xylem cells including xylem parenchyma cells and xylem ray parenchyma cells...

愈伤组织由靠近伤口表面未成熟的本薄壁组织细胞和木射线细胞分裂产生，维管形成层在愈伤组织内层发生，且是一个渐进的过程。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐