扩孔

Its sophisticated products can be widely used in machining of drilling, reaming, Reaming, Tapping countersink flat and so on.

其精良的产品可广泛应用于机械加工中的钻孔、扩孔、铰孔、锪平面及攻螺纹等。

Several underreaming methods have been introduced. A new type of grouting-open soil anchorage with flukes is also presented.

介绍了端头扩大型锚杆的各种扩孔方法，重点阐述一种新型的船锚式注浆张开型土锚。

A new type of grouting-open soil anchorage with flukes is also presented. This anchor doesn't need some specific tools to expand the bottom.

介绍了端头扩大型锚杆的各种扩孔方法，重点阐述一种新型的船锚式注浆张开型土锚。

Comparing with the traditional theory, the application scope was extended and it can be used to analyze quadrate hole and others.

与圆孔扩张理论相比，可以推广进行其他截面形式的桩扩孔的分析研究，从而扩大了其应用范围。

Reamer "wings" on teks create a clearance hole in what type of material?

钻通孔时带"翅"扩孔用在什么类型材料中？

Simulation results of initial hole included the relationship of punch load and punch stroke, the hole profile, the distribution of stress and strain, the forming limit diagram, and the variation of the workpiece thickness. The simulation results showed good agreement with the experiments in the bore-expanding process.

由初始孔径4mm之料片於扩孔成形之数值模拟与实验结果比较得知，冲头负荷与冲程关系、内孔轮廓大小、应力与应变分布、成形极限图与工件厚度分布等，皆显示实验与数值模拟间的一致性。

Pseudo-boehmite was prepared with nitric acid and sodium aluminate under the same precipitation conditions but different ageing and washing conditions. The influences of ageing temperature, ageing time and ageing media were studied. It was shown that pronging the ageing time and increasing temperature lead to improve crystallinity of PB., the pore diameter of PB can be increased after NH4HCO3 is added in the ageing medium.

在相同成胶条件下利用铝酸钠溶液和硝酸制备拟薄水铝石，而在不同条件下进行老化，研究了老化温度、老化时间及老化介质的影响，结果表明延长老化时间、提高老化温度和老化pH值有助于结晶度的提高，使用NH4HCO3等具有扩孔作用的溶液作为老化介质会降低产品的堆密度和增加孔径、孔容、比表面积。

It is mainly be used for drilling, reaming, the cutter hole, tapping and so on.

主要用来进行钻孔、扩孔、绞孔、攻丝等。

The relationship between anodic polarization of etched Al foils and performance in increasing tunnel diameter in both HCl and HNO3 etchants was studied.

摘 要：研究发孔铝箔在盐酸和硝酸溶液中的阳极极化行为与扩孔特性的关系。

A finite element analysis on the new method is presented in this paper. Based on the finite element analysis, tension tests of 18 steel bars in different diameters and holes are carried out. The results of tests, which are according with that of finite element analysis, validate the new method to determine real stresses of steel bars by drilling/enlarging small holes. Furthermore, some suggestions in using of the new method are given.

本文针对该新方法进行了有限元分析，并在此基础上进行了18种不同钢筋直径和不同孔径的带孔短钢筋拉伸试验，试验结果与相应有限元计算结果一致，验证了钻／扩孔确定钢筋实际应力的新方法，并提出了若干工程适用建议。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。