弯

The results were as follows: the air-dried density(moisture content of wood is 12%),the basic density and the oven-dry density were 0.583 g·cm-3,0.462 g·cm-3 and 0.507 g·cm-3 respectively,the air-dried density was at the medium level in domestic wood species;the shrinkage coefficient of radial,tangential and volumetric were 0.099%,0.183% and 0.296% respectively,the maximum s...

结果表明：大叶栎木材的气干密度(含水率为12%)、基本密度和全干密度分别为0.583 g.cm-3、0.462 g.cm-3和0.507 g.cm-3，气干密度属于国产木材的中等级水平；径向、弦向和体积干缩系数分别为0.099%、0.183%、0.296%，湿胀率依次为4.106%、7.958%和12.627%，差异干缩为1.5-1.9，其尺寸稳定性较好；冲击韧性为52.12 kJ.m-2，端面、径面和弦面硬度分别为41.53 MPa、31.41 MPa和35.51 MPa，顺纹抗压强度为44.50 MPa，抗弯弹性模量和抗弯强度分别为12.63 GPa和127.31 MPa，径面和弦面顺纹抗剪强度分别为8.76 MPa和10.54MPa，抗劈强度依次为124.3 N.mm-1和138.6 N.mm-1。

Traditional process of ship plates forming use oxy-acetylene torch heating as heating sources. Compare with oxygen-acetylene torch, high frequency induction heating has a lot of advantages. Based on such an engineering background, this subject is aimed at exploring practical ways to apply induction heating in line heating process.

传统的水火弯板工艺都是采用氧乙炔火焰作为热源对钢板进行加热的，与之相比采用高频电磁感应作为热源有着诸多优势，本文就是在这样一个工程背景下，对感应加热这一新型热源在水火弯板工艺上的应用进行探索。

Group companies responsible for water, electricity, gas supply, foreign Forwarders Electrical engineering, plumbing engineering, Die with, cold-formed and welded pipe mill roll forming production, welded pipe mill, cold-formed units, strip slitting unit and other non - Design and manufacture of standard equipment.

公司除负责集团公司水、电、汽供应外，对外承揽机电工程、水暖工程、冷冲模具、冷弯及焊管机组成型轧辊制作、焊管机组、冷弯机组、带钢纵剪机组等非标设备的设计制作。

The checking-tools for bended pipe is an important tool which tests bended pipe rapidly and measuring its error. The designing of it is even more important because it is different from distinct bended pipe.

弯管检具作为快速准确检测弯管产品合格性和误差的工具，由于有很强的专用性，其设计尤为重要。

But the current specification GB50018-2002 does not consider the effect of lip inclination, hence, it cannot be effectively used in designing inclined lipped Z-section purlins.

而现行冷弯型钢设计规范GB50018-2002采用有效截面法计算受弯构件的屈曲荷载并没有考虑卷边角度的影响，不能合理的进行斜卷边Z型檩条的屈曲荷载设计。

Then press the upper plate down in 1 second in standard temperature until to the given position.

待恢复到室温后观察弯折处是否断裂，或用 6 倍放大镜观察试件弯折处有无裂纹。

Locking pedicle screws were placed into pedicles of apical vertebra and the 3 to 5 adjacent vertebrae.

男106例，女103例，其中特发性脊柱侧弯92例，先天性脊柱侧弯72例，青年驼背26例，其他19例。

The roll crown curve optimization increased effect on bending force for controlling strip shape, and decreased bending force of the work roller.

优化辊型显著增强了弯辊力控制板形的效果，使板形质量得到提高，减少了工作辊弯辊力的使用量。

Bender controlling is belong to automatic pressure control system, though set bending force can change work roller slit camber validity, and cancel double and four tabular of shape deviation, and improve the disadvantage of shape symmetry, so it is very important in practice.

弯辊控制属于自动压力控制系统，通过调整弯辊力可以有效地改变工作辊的辊缝凸度，消除板形偏差中的二次、四次分量，改善对称板形缺陷，是现场技术攻关的重点。

When she was later tested with just thestraight wire, Betty repeatedly bent it into hooks - and otherexperiments with aluminium strips revealed how she would bend, shortenand lengthen the material to get to her food.

在后来的实验中，研究人员只给它准备了直的铁丝，结果，贝蒂又重复了用嘴弄弯铁丝的动作。研究人员又用铝条进行类似实验，发现贝蒂为了得到食物，同样会把铝条弄弯，裁短或拉长。

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