内接角

In this paper, firstly we researched the relationships of the communicating distanceand the channel characteristic, the effect of the multiple scattering to the laserpropagation, the requirement of the laser communication to the ATP system and theway to determine the angular dispersion and receive field of view. It is proved that inlight haze weather, letting the input and output laser\'s wavelength are diferrent witheach other, after passing by the filter, it can avoid backward scattering effectually andfor the communication within 15km, the influence of the multiple scattering inatmosphere can be ignored.

论文对通信距离与信道特性、多次散射对光传输的影响、无线激光通信对ATP带宽的需求以及光束发散角和接收视场角等重要系统性能参数和指标进行了分析和研究，证明了在轻霾天气状态下，使系统中两终端发送的激光束波长各不相同，经过光束滤波，可以有效地消除后向散射干扰；在15km的通信距离范围内，大气中的多次散射对无线激光通信光传输的影响可以忽略。

Perforating spanner, tyre spanner, crowing spanner, spanner, crossing spanner, universal spanner, spark plug spanner, inner hexagonal spanner, bidirectional oil core spanner, ball puller, refined chain stripper, vent-pipe tools, bearing tools, valve tools, clutch tools, gear stripper, stripper, curving pole, connecting pole, slipping pole, spanning pole, striking spanner, striking sleeve, short sleeve, double-claw puller, trinal-claw puller, magnetoelectric machine puller, spring.

宁波市鄞州佳欣工具厂 Ningbo Yinzhou Jiaxin Tools Factory 4C72 穿孔扳手、轮胎扳手、撬杠扳手、T型扳手、十字扳手、万向扳手、火花塞扳手、内六角扳手、三爪双向机油芯扳手、球头拔卸器、精品拆链器、排气管工具、轴承工具、气门拆装工具、双向离合器工具、正时齿拆卸工具、拆卸器、撞批嘴、批咀、弯杆、接杆、滑杆、扳杆、冲击起子、冲击套筒、短套筒、二爪拉具、三爪拉马、二爪拉马、磁电机拉马、螺丝批。

Principal products of our company: screw and nut for furniture, gharry screw, T type screw, loose joint bolt, flower basket bolt, expansion bolt, closing ring for bearing and aperture, Shanghai rivet, copper, iron and aluminum rivet, stainless steel standard pieces, flat key, pin key, automatic drilling nail, 12.9 level alloy steel hexagonal socket, tightening screw, countersunk head hexagonal socket screw, 10.9 steel structure bolt, machine bolt, firmware of DIN, ANSI, BS and JIS.

本公司生产和销售家具螺丝螺母、马车螺丝、T型螺丝、活接螺栓、花篮螺栓、膨胀螺栓、轴用孔用挡圈、上海拉铆钉、铜铁铝铆钉、不锈钢标准件、平键销键、台湾合资自攻自钻钉、12.9级合金钢的内六角、紧定螺丝、沉头内六角螺丝、10.9级钢结构螺栓、机螺钉、各种德标、美标、英标、日标紧固件。

Spherical Roller Bearing Raceway surface curvature of the center and center bearings, aligning with the performance, in the case axis deflection can be adjusted automatically, without increasing the burden of bearing, affordable way of radial and axial load capacity, Radial load capacity of large, heavy-duty applicable, the impact load of occasions.

圆锥滚子轴承的内、外圈具有锥形滚道，滚道之间装有锥形滚子，圆锥滚子轴承主要用城承受以径向负荷为主的径向，轴向联合负荷。轴承的内组件和外圈可以分离，方便了安装和拆卸。轴承的轴向承载能力由接触角α决定，α角越大，轴向承载力越大。

Next the discussion in this study, about an ellipse with an angle of attack and two circular cylinders with different diameters in the flow, the aim of this study is investigated for the ability of the present numerical method by solving the suppression of the vortex shedding flow behind the two-cylinder system which was kind of difficult to reach by a Cartesian grid method. In this study, the suppression of the vortex shedding flow is tested to solve a uniform flow past through two different diameter cylindrical in the flow field with Fractional Step Method and Immersed Boundary Method.The numerical method which we investigated is showed that the results of the problem is appropriable in other literatures.

接著探讨流过具攻角之椭圆柱体流场及流过圆柱抑制涡漩逸出之流场，目的是要研究利用控制圆柱来抑制下游涡流的流场行为，本文采用分步法配合内嵌边界法数值解析一均匀流流经两不同直径的圆柱流场，来测试抑制涡流逸出的问题，根据现有的数值结果发现试验运用了合适的方法且得到令人满意的结果。

The geometry model formular is used to deduce the length of yarns, the oridentation angle of the nodulated yarns and the fiber volume content on some typical 2.5-D woven composites, such as shallow curve-linking structures, shallow straight-linking ones, and depp angle-linking ones, and tensile strength and compress strength of the composites are forecated.

借助模型推导出纱线在几种典型结构（浅交弯联、浅交直联、深角联）的单元体结构内的纱线长度、接结经的取向角和纤维体积分数，并对材料进行拉伸、压缩性能预测。

Butt Weld and docking and corner combinations Weld, in Weld ends located arc plate and extraction plate in igniting board then leads to the welding seam, joint halfway shall weld joints in front of 2.0 mm Department Firing arc, welding pieces after preheating rod will return to weld the origin, pool filled to the required thickness, before forward welding; Welding speed : Isokinetic welding requirements to ensure weld thickness, width uniform, which masks to look for hot metal and slag bath equidistance (2-3 mm)%; Arc welding rod length : different models and determined that the general requirements of arc length is stable, acid electrode generally 3-4 mm, 2-3 mm normally alkaline electrode%; Welding perspective : According to determine the thickness of two pieces of welding, welding angle has two aspects : First, the angle between the direction of the rod and welding of 60-75 ; The second is the angle between two electrodes and welding around, the same thickness as welding, welding and welding pieces incident angle of 45 ; When the thickness ranging from welding, welding electrode and thick and thin pieces of welding electrode side angle greater than the angle between the side pieces; Arc : admission to the end of each weld should be filled crater, in the direction opposite to the direction of the back-arc welding, arc welding unchanged inside pit in 1974, to prevent the crater bite of meat.

对接焊缝及对接和角接组合焊缝，在焊缝两端设引弧板和引出板，必须在引弧板上引出后再焊到焊缝区，中途接头则应在焊缝接头前方15～20㎜处打火引弧，将焊件预热后再将焊条退回到焊缝起始处，把熔池填满到要求的厚度后，方可向前施焊；焊接速度：要求等速焊接，保证焊缝厚度、宽度均匀一致，从面罩内看熔池中铁水与熔渣保持等距离（2～3㎜）为宜；焊接电弧长度：根据焊条型号不同而确定，一般要求电弧长度稳定不变，酸性焊条一般为3～4㎜，碱性焊条一般为2～3㎜为宜；焊接角度：根据两焊件的厚度确定，焊接角度有两个方面，一是焊条与焊接前进方向的夹角为60～75 ；二是焊条与焊接左右夹角有两种情况，当焊件厚度相等时，焊件与焊件夹角为45 ；当焊件厚度不等时，焊条与较厚焊件一侧夹角应大于焊条与薄焊件一侧夹角；收弧：每条焊缝焊到末尾，应将弧坑填满后，往焊接方向相反的方向带弧，使弧坑甩在焊道貌岸然里边，以防弧坑咬肉。

The results show that the main cause of the angular distortion of the lap joint is the non-uniform distributed inherent shear strain component that is vertical to the weld line and exists in the plane paralleling to the weld line.

结果表明：搭接接头焊接角变形的产生主要是由焊缝及其附近区域与焊缝平行的平面内垂直于焊缝方向上不均匀分布的固有剪切应变分量引起的。

Self-fluxing Fe-Cr-Ni-B-Si alloy prowders are laser clad on medium carbon steel substrate of dimensions 80×35×10mm〓. The investigation results of this clad layer are: micro-defects, micro-cavity and occluded forin substance, are the micro-cracks and crack resourses in clad layer; crack of coating propagates along the boundary of two kinds of eutectic sutructure; The included angle θ between the cracking direction and laser scanning direction in multitrack overlapping clad is smaller than that in one-track clad because of crack propagating along crystalline growth direction and crystalline direction in overlapping zone being different from it in one-track clad.

在调质态的45〓钢表面，采用预置粉末法进行FeCrNiBSi合金的多道搭接激光熔覆，对其熔覆层进行分析表明：多道搭接激光熔覆层裂纹扩展方向与激光扫描方向间的夹角θ与单道熔覆时相比明显变小，前者θ0°，后者θ角基本都为90°，这主要是因为多道搭接时，搭接区结晶方向发生了变化以及裂纹沿结晶方向扩展所致；激光熔覆层裂纹大多是以覆层与基材交界面的孔洞、熔覆层内不同方向共晶团间的显微缩孔、夹杂物的边界等三种显微缺陷作为裂纹源，并沿低熔点物相形成元素偏析造成弱化膜的共晶团界面扩展延伸。

Road racing and mountain biking relate easily to the average rider's view of cycling. Track cycling does not. In track cycling, the riders go nowhere, just around and around an oval track banked at 42 degrees. The track's name - the velodrome - sounds space-age, and the helmets, suits and bikes bearing no resemblance to a common two-wheeler more closely resemble something out of Star Wars.

公路自行车项目和山地自行车项目似乎更符合普通人对自行车项目的认识，但对场地自行车却不同，场地自行车运动员只是在呈42度角倾斜的场地内一圈接一圈地骑行，赛车场、运动员的头盔、比赛服和自行车本身都仿佛来自《星球大战》，和普通自行车项目相距较远。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。