角形

When measuring, based on the segmented contour line of thread, we used the compiled measurement program to calculate and measure the geometrical parameters of the internal taper thread as pitch, half of thread angle and taper angle. Precisions of pitch, half of thread angle and taper angle reached ±0.012mm,±0.17° and ±0.018°. The results satisfied with the technique requirement of production. The reason of error was analyzed.

在测量尺寸时，使用自编程序计算测量内螺纹的螺距、牙型半形及锥角，测量精度分别达到±0.012mm、±0.17°和±0.018°，满足产品的技术要求，并分析了误差产生的原因。

At that very moment, a huge jagged streak of lightning sliced the sky and its sizzling wicked end found mark on top of an very tall pine that stood at the far western corner of cabin

一片巨大的锯齿形条痕雷电划破夜空，烧得哧哧响的，令人憎恶的一端把小屋西角的那颗老松树的树顶灼去了一片。

Specifications for the scope of é 1.5 ~é 85mm round light, S5 ~ S75mm hexagonal-to-edge, 4 * 4 ~ 60 * 60mm square steel, ordered the file flat, triangular, semi-circular, such as special types of steel.

可供规格范围￠1.5～￠85mm光圆、S5～S75mm对边六角、4*4～60*60mm方钢、订制各档扁形、三角形、半圆形等特种类型钢。

Either of two spiral-horned antelopes of the African bush.

非洲丛林地区的两种螺旋形角的羚羊。

The tooth profile error and longitudinal form error are calculated,and the change rule with setting angle of them is got.

针对花键的齿形误差和齿向误差，按照误差计算原理，得出了计算结果及其随安装角改变的变化规律。

The InGaAs/GaAs/AlGaAs strained layer quantum well lasers were grown by molecular beam epitaxy. Ridge waveguide InGaAs/GaAs/AlGaAs strained layer quantum well lasers operating in the fundamental transverse mode up to 140 mW at a wavelength of 980 nm were fabricated.

利用分子束外延生长了InGaAs/GaAs/AlGaAs应变量子阱激光器材料并研制出基横模输出功率大于140 mW，激射波长为980 nm的脊形波导应变量子阱激光器，其微分量子效率为0.8 W/A，垂直和平行结平面方向远场发散角分别为28°和6.8°。

An antelope of India that inhabits open grasslands and in the male has long, spiraled horns and a black coat with white underparts.

印度黑羚印度一种羚羊，居住在开阔的草地，其雄性有螺旋形长角，腹部呈白色的黑色皮毛

C. Using a 2mm Allen wrench, turn the black adjustment set screw clockwise to make the two-speed shift later; turn it counterclockwise

c。 以2mm的L形内六角扳手转动黑色调整螺丝：顺时钟方向转动让2段变速的换档时间晚些；逆时钟方向转动则会提早2段变速的换

On the 2nd gear as shown on the diagram.c. Using a 2mm Allen wrench, turn the black adjustment set screw clockwise to make the two-speed shift later; turn it counter

c。 以2mm的L形内六角扳手转动黑色调整螺丝：顺时钟方向转动让2段变速的换档时间晚些；逆时钟方向转动则会提早2段变速的换

The anticlastic curvature caused by bending is 1700 times as long as the sagittal curvature, and the incident angle error is only 2.2 μrad. The Von Mize stress on the bender is about 806 MPa. When Beryllium-Cu is selected as the material of the bender, the linear relationship between the curvature of crystal in 0.57~1.72 m and the driving forces in 8~2.67 N is obtained.

优化后晶体因压弯产生的鞍形曲率半径约为弧矢曲率半径的1700倍，造成的人射角误差为2.2μrad；压弯装置上的最大平均应力约为800MPa，并由此确定了以铍青铜作为压弯机构的材料，晶体的曲率半径为0.57~1.72m和驱动力为8~2.67N时的线性关系。

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