孔

Grain boundary slidings happen in this alloy at the creep temperature of 200 ℃ and the deformation of this alloy is coordinated by intragranular slip and grain boundary sliding.

结果表明：在125~200 ℃蠕变温度下，当蠕变寿命接近100 h时，2024铝合金的蠕变应力随着温度的升高明显下降；与125 ℃相比，150 ℃时合金的蠕变应力下降9.3%，在175 ℃时合金的蠕变应力下降30.3%；当蠕变温度为200 ℃时，该合金的蠕变应力下降幅度达到45.8%；在125~175 ℃下，合金在蠕变过程中的变形机制主要为位错在晶内的滑移；在200℃时，合金晶界开始发生滑移，合金变形由晶界滑移与位错在晶内的滑移协调完成；在合金蠕变断面上存在大量微孔，随着蠕变温度的升高，微孔的尺寸明显变大，当微孔尺寸超过3 μm时，微孔对合金的断裂机制有显著影响；在125和150 ℃下，合金的蠕变断口呈现韧窝型穿晶断裂特征；在175和200 ℃下，合金的蠕变断口呈现沿晶断裂特征。

The cut-off valve with pilot valve without hand wheel, stem and lift nut inside will guide block and guide slot Butterfly Valves to guide sleeve, the disc-shaped disc to disc type bowl shape, and holes in the bottom of the flap valve to open, the valve cover of the original valve stem hole to hole diversion, because of increased pressure ring, ring, and the valve flap to class mortar, so that the flow passage separated the upper chamber cavity, external cavity, cavity, in the cavity and The external cavity increases with draft tube and stainless steel manual ball valve, flap valve in the cover plate and the center of the end of installing the spring, the upper flap valve install compression seal of the pressure ring, outside the cavity of the wall to open a Drainage holes.

带先导球阀的截止阀无手轮、阀杆和内升降螺母，将导向块与导向槽改为导向套，将盘形阀瓣改为类钵体形阀瓣，并在底部开阀瓣孔，电动蝶阀将阀盖原阀杆孔改为导流孔，因增加压环、密封圈和将阀瓣改为类钵体，使上通流腔分隔为上腔、外腔、内腔，在上腔与外腔的外部加设有导流管与不锈钢手动球阀，在盖板与阀瓣底的中心部加设弹簧，阀瓣上部加设压紧密封圈的压环，在外腔的壁上开有放水孔。

Combining traditional DTH hammer with pneumatic rock drill,by reference to the rotational mechanism of rock drill,studies the rotational mechanism of DTH hammer and introduces a new type of DTH hammer that uses backstroke energy of piston to drive drill to rotate.

将传统的潜孔锤与凿岩机相结合，研究了潜孔锤孔底回转机构，介绍了一种新型的潜孔锤。

By means of the present model certain phenomena related to the nonlinear acoustic properties of an orifice, such as the roll-up of the shed vortex sheet and the forming of the Vena-Contracta are simulated. For a sinusoidal sound pressure, the time- history of the average velocity through the orifice is computed, and the nonlinear distortion of the velocity is examined by means of the Fourier decomposition.

依据此模型，对圆孔声学非线性效应的若干特征现象进行了数值模拟，如脱落涡层的卷曲，Vena收缩段的动态形成；在孔板前声压按余弦规律变化的情况下，计算了孔中平均速度的时间历程，并借助于Fourier分解分析了孔中平均速度的畸变情况。

The company has windowed corrugated plate packing, small ripple from the saddle ring loose fill, such as utility model patents, the main processing and manufacturing of petroleum, chemical, oil refining, coking, pharmaceutical and other industries within the pieces of stainless steel towers, such as: air-tube distributor, distributor disc groove, double row vane distributor, driven valve trays, tongue-shaped tray, floating tongue trays, sieve trays, bubble cap trays, metal mesh corrugated structured packing, metal packing puncture calendering, sheet corrugated structured packing, turtle nets, packing bearings, all kinds of loose packing such as Rasi ring, Pall Ring, ladder ring, flat ring, Intalox ring, metal wreath tower, etc.

公司拥有开窗式孔板波纹填料，细波纹环距鞍散堆填料等实用新型专利技术，主要加工制造石油、化工、炼油、焦化、制药等行业不锈钢塔器内件，如：管式空气分布器、槽盘式分布器、双列叶片式分布器、导向浮阀塔盘、舌形塔盘、浮舌塔盘、筛孔塔盘、泡罩塔盘，金属网孔波纹规整填料、金属压延刺孔波纹填料、板波纹规整填料、龟甲网、填料支承，各种散堆填料如拉西环、鲍尔环、阶梯环、扁环、矩鞍环、金属花环等塔内件。

The modular machine tool is used to tap 18 screw holes of M8 and M10 on the left, 15 screw holes of M8, M10, M12 on the right and three screw holes of Z1/4, a screw holes of G3/8 on the back surface. The modular machine tool uses the horizontal-type single location three-side processing plan, the processing and assembly technology capability is good, and it clamps conveniently.

同时采用机械滑台，一次装夹，对左面15个M8-7H深14和3个M10-7H深15的螺纹孔，右面7个M8-7H深14，3个M10-7H深15，5个M12-7H深20的螺纹孔以及后面3个Z1/4&-5H深20和1个G3/8&-5H深20的螺纹孔同时进行加工，不仅保证了孔的加工精度，而且还大大地提高了加工效率。

The modular machine tool is used to tap 18 screw holes of M8 and M10 on the left, 15 screw holes of M8, M10, M12 on the right and three screw holes of Z1/4%26rdquo;, a screw holes of G3/8 on the back surface. The modular machine tool uses the horizontal-type single location three-side processing plan, the processing and assembly technology capability is good, and it clamps conveniently.

同时采用机械滑台，一次装夹，对左面15个M8-7H深14和3个M10-7H深15的螺纹孔，右面7个M8-7H深14，3个M10-7H深15，5个M12-7H深20的螺纹孔以及后面3个Z1/4%26quot；-5H深20和1个G3/8%26quot；-5H深20的螺纹孔同时进行加工，不仅保证了孔的加工精度，而且还大大地提高了加工效率。

This transverse bamboo flute has a blowing hole, a stop hole and six finger holes.

吹孔气鸣乐器，笛体上升有吹孔和膜孔各1个，按音孔6个

PE or PEN line should connect to upper pole of single phase 3 pole socket, 3 phase 4 pole socket and 3 phase 6 pole socket.

单相三孔、三相四孔及三相五孔插座的接地或接零线接在上孔。

Parts of the Process Analysis、Process improvements、Die with a complete composite blanking process Piercing 、Expounded washers composite Die Blanking the overall structure and characteristics of the process, Should pay attention to the issue of sexual and assembly process ,Piercing the settlement sheet、 And seam compound die punch slender easily broken、Hole coaxial hard to ensure the short life and die of technical problems.

通过对零件的工艺分析，改进了工艺方案，用一套复合模完成落料冲孔工序，阐述了垫圈冲裁复合模具的整体结构特点及工作过程，应注意的问题和装配工艺性。解决了薄板冲孔、冲缝复合模的凸模细长易断、孔的同轴度难以保证以及模具使用寿命短的技术问题。改进了落料、冲孔、冲缝的制作工艺，设计了一套新型复合冲裁模，提高了工件的同轴度精度，延长了模具的使用寿命。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失