圆和

A type of quick-opening valve whose orifice is opened and closed by a disk that pivots on a shaft in the throat of the valve.

一种快开式阀门，其孔口的开启和关闭靠装在阀门颈部枢轴上的圆盘。

Sculptural concrete ramp, gallerybridge, round columns decorated with decorative pattern and cockle stairs of the theater are best choices for creative people to hold activities.

充满雕塑感的混凝土坡道、廊桥、花纹装饰的圆柱子以及剧院的螺旋梯是创意人士工作和举办创意活动的不二选择。

In the dissertation, the nonlinear bending of circular sandwich plates based on Reissner theory is analyzedThe method of Point Collocation are used in the calculation,with the B-spline function taken as the trial function.

本课题研究了基于Reissner理论的夹层圆板的非线性弯曲问题。文中采用配点法计算，以三次样条函数作为应力函数和挠度函数的试函数。

Put two circles in the artboard side by side so that they overlap and fill the circle with color.

方提出的两个圆的画板让双方重叠和填充颜色循环。

It is a contact and complaisant seal, which allows the sealing surface radial fluctuating in certain amount.

它由多个带"指"的圆环片、前后挡板和隔片组成，是一种接触式柔性的封严结构，能允许封严面有一定的径向跳动。

Solid carbide tungsten fishtail drill is suitable for pcb flexible foil clad laminate,used for target machine drilling,the features of pcb fishtail drill are thin and flexible plate,it's structure and cutting methods are different with normal pcb drill bits.its two main cutting edge is concave and formed 100degree angle,in order to distinguish with PCB drill,named fishtail drill.fishtail drill cuts beginning of circular drill.concave along the main cutting edge to cut,chip is just two much fine filament.cuttingis falling off naturally,in order to be processed without burrformation by pcb surface.

整体硬质合金鱼尾钻适合印制电路板行业加工挠性覆箔板，为打靶机钻孔用。鱼尾钻所加工的印制电路板特性是薄板、带柔性、这样就决定了它的结构和切削方式与一般PCB钻不一样，它的两主切削刃是内凹的，两主切削刃形成100度的夹角，为了与PCB钻区别，就叫它鱼尾名。鱼尾钻切削时从我圆处钻尖开始，沿着内凹的主切削刃切削，切屑只是两条极细丝状切削，整个切削自然剥落，从而被加工印制板表面平整无毛刺。

Must ensure that the car has concentric outer circle with the machine tool spindle (Micrometer can be measured on the surface of the workpiece has been processed on the side of the bus and bus).

必须保证已车外圆与机床主轴同心（可用千分表测工件已加工表面的侧母线和上母线）。

In Figure 3, A and B are two cones inside a cylindrical tube with length of 20

在图三，圆管的长为 20 及直径为 6 ，内有个圆锥体 A 和 B。

Typically, arc and circle are the most widely used contents of the conic.

其中应用最为广泛的是圆弧和圆。

Internal Grinder: ordinary type-based series, mainly used for grinding cylindrical and conical inner surface of the grinder.

2内圆磨床：是普通型的基型系列，主要用于磨削圆柱形和圆锥形内表面的磨床。

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