中心线

Center line of valve to base of floorstand 72 1829mm

阀门中心线到地轴承架底部的距离为72英寸 1829毫米

To order, specify length from center line of valve to base of floorstand.

订购时，注明从阀门中心线至地轴承架底部的距离长度。

Center line of valve to handwheel nut 72 inches (1829mm).

阀门中心线至手轮螺母的长度是72英寸(1829毫米)。

Cut-off valve is closed parts along the center line to move the valve seat.

截止阀是指关闭件沿阀座中心线移动的阀门。

The visible section should be represented from contours or from the center line of the wire's cross section.

被弹簧挡住的结构一般不画，可见部分应从弹簧的外轮廓线或从弹簧簧丝断面的中心线画起。

The dog does not track on widely separated parallel lines, but brings the feet inward toward the middle line of the body when trotting, in order to maintain balance.

德国牧羊犬的足迹不应该是两条分的很开的平行线，小跑时，足爪应该向内，靠近身体中心线，以保持平衡。

The proper Clumber roll occurs when the dog, with the correct proportion, reaches forward with the rear leg toward the centerline of travel and rotates the hip downward while the back remains level and straight.

克伦伯猎鹬犬正确的滚动步态出现在比例正确，后腿向前伸展时，趋向于身体中心线，使臀部向下转动，而背部保持平直。

Based on system analysis and study of the present design proce- dures of highway width,the paper proposes a set of computer block diagrams for opitimun design of four-lane highway width,By the curvature radius of comber Line of the highway,given in overall design,and related characteristic parameter of the largest vehicle to be allowed to pass through.it is easy for design technicians to complete optimizing design of the lane width with the help of the computer block diagrams.

在对现行公路宽度设计方法进行系统分析及研究的基础上，本文提出一组四车道公路机功车车道宽度优化设计计算机框图。根据总体设计提供的公路各曲线段中心线曲率半径及允许通行的最大车辆的有关特性参数，公路工程设计人员很易通过该组计算机框图圆满地完成四车道公路机动车车道宽度的优化设计工作。

To detect the position of crop-rows, a method based on Hough transform and connected component labeling was put forward. First, a true color image of field crops was processed with gray histogram and OSTU respectively. Then the noises in the image were eliminated by means of eight connected component labeling according to their areas. The centroid coordinates of each labeled crop were computed after the second labeling, through which the center line of the crop-row was regressed by Hough transform. Experimental results show that the method is effective.

该方法分别用直方图法和最大类间方差法二值化图像后，经过8连通区域标记后据其面积属性去除噪声，然后再经一次标记后找出各标记作物的重心点坐标，最后通过Hough变换检测过重心点的直线，即到得到过作物行的中心线，试验结果表明了该方法的有效性。

Cheap permanent magnets are buried at four-foot intervals along the lane centerline and detected by magnetometers mounted under the vehicle's bumpers..

价格低廉的永磁体以4英尺的间隔埋设在车道中心线上，车辆保险杆下安装着的磁强计能够测知。

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％。