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Put in the drawbar to the spindle shaft center hole. 将连接杆放在主轴中心孔。
Designed for pipe work, tube work,, and parts with extra-large center holes. 该设计适用于管子、筒类及特大中心孔。
Material: plies of 100% cotton cloth sewed in the form of a spiral around the center hole. 材料：用定织纯棉布多层折叠，车缝中心制成。
Figure 1.These fine matched huaigu (each approximately 19 x 4.5 mm) have been set as cufflinks, with diamonds inserted into their center holes. 如图1所示，这对精致的平安扣（每个大约是19*4.;5毫米）被做成了纽扣，中央的小洞还镶嵌了钻石。
We put thirty spokes together and call it a wheel; but it is the center hole that makes the wagon move. "三十辐,共一毂,当其无,有车之用"
On the condition of rimming steel wire center hole, the paper investigates the process control of 40 heats with center hole, and analyzes its cause. 针对高速线材沸腾钢盘条产生中心孔洞缺陷的情况，对40炉有中心孔洞缺陷的炉号进行了工艺控制情况的调查，分析了产生中心孔洞缺陷的原因。
The nickel stamper is then cut to the appropriate diameter along with punching a center hole used to center the stamper in the moulding machine. 最后在镍制压模上冲切用于在成型机安装的中心孔，并以中心孔定位切割到适当的直径。
Zhang Na,Cai Ruixian.Explicit analytical solutions of unsteady temperature field in steam turbine rotor with center hole[J].Procee dings of the CSEE,1999,7(19):38-39. [3]张娜;蔡睿贤.;考虑中心孔影响的汽轮机转子不定常温度场显式解析解[J]
Through the analysis of technology for spindle-foot spindle of thread spinner, the projects of cold extrusion technology and forming process that drilling center hole and multiple cold extrusion, have been put forward. 摘要通过对纺机锭脚的工艺性分析，提出了可行的冷挤压成形方案，即采用多工序冷挤压和钻孔的加工方法进行锭脚生产。
The correct approach is: position to pull the plunger to the top edges and corners with the plunger set flush into the center hole, slowly rotating the plunger, then there will be a sense block. 正确的处理方法是：将柱塞顶棱角部位拉至与柱塞套进油孔中心处平齐，缓缓转动柱塞，这时会有阻滞感。
End milling and center hole machine 铣端面打中心孔机
Blank-holding slide center hole SIZE 压边滑块中心孔尺寸
He moved the table over to the center of the room. 他把桌子移到房间中心。
The land is destined for a new shopping center. 这块地已被划作为营建一个新购物中心之用。
His activities in London center around this spot. 他在伦敦的活动以这个地点为中心。
The strikers paraded through the city center. 罢工队伍游行穿过市中心。
A system of roads radiates from the town center. 一个道路网从镇中心向四面八方伸展出去。
The new hospital will be sited at the city center. 新医院将座落在市中心。
New York is a great financial center. 纽约是一个重要的金融中心。
The center of the sun is exceedingly hot. 太阳的中心极其热。