centering ball

The changing rules between centrifugal force of steel balls and speed of grinding mill have been set forth in this paper.

从理论上阐明了抛落式工作磨机内钢球离心力的大小、方向与转速率之间的变化规律 。

The practical application of hollow steel ball, solid bolt ball and mine bolt ball to architectural engineering is introduced in this article.

介绍空心钢球、实心螺栓球体和水雷式螺栓球体在建筑工程中的实际应用

The Study on Huge Welded Hollow Sphere Joints of Complex Spacial Steel Structure;

复杂空间钢结构巨型焊接空心球节点的研究

Load-Carrying Capacity and Practical Calculation Method of Welded Hollow Spherical Joints Connected with Square and Rectangular Steel Tubes;

方钢管、矩形钢管焊接空心球节点的承载力与实用计算方法研究

Analysis on Stress Concentration of Grid Structure with Pipe-Welded Hollow Spherical Joints;

网架结构钢管—焊接空心球连接节点的应力集中分析

Constant Amplitude Fatigue Test Research of Endplate-Steel Tube of Welded Hollow Spherical Joints of Flatbed Grid Structure

平板网架结构焊接空心球节点端板—钢管连接常幅疲劳试验研究

Destructive mechanism and experimental study of welded hollow spherical joints connected with circular steel tubes

圆钢管焊接空心球节点受压破坏机理与试验研究

reinforced concrete hollow pier

钢筋混凝土空心桥墩

A tennis ball is hollow,but a base ball is solid.

网球是空心的，但棒球是实心的。

Temperature-triggered Assembly of Ta_2O_5 Hollow Microspheres

热诱导组装Ta_2O_5空心微球

The Research on the Elastic-Plastic of Space Cast Steel of Hollow Spherical Joints and Steel Frame Joints;

空间铸钢球节点与钢框架节点的弹塑性研究

New Globe-tube Soldering Techoology of Soldering Hollow Globe-Net-Shelf Struct ure;

焊接空心球网架结构球—管焊接新工艺

RESEARCH ON BONDED STEEL REINFORCEMENT TEST OF REINFORCED CONCRETE SIMPLY-SUPPORTED CORED SLAB BRIDGE

钢筋混凝土简支空心板桥粘钢加固试验研究

Analysis of Vertical Bearing Capacity of Concrete-Filled Double Skin Steel Tube Columns

中空夹层钢管混凝土的轴心受压研究

The numerical simulation of hollow i-beam forming process based on ANSYS/LS-DYNA

空心工字钢冷弯成型过程的数值模拟

A Study on the Ductility Coefficient of Hollow Concrete-Filled Circular Steel Tubular Columns

空心圆钢管混凝土柱延性系数的研究

Application of the Hollow Steel-tube Slab Beamless Floor Structure System

钢管空心板无梁楼盖结构体系的应用

He'll take his shots from downtown and get nothing but net.

他在三分区投篮，进球连篮框都不碰，全是空心球。

hollow celluloid ball.

球改成用非常轻的赛璐珞制成的空心球。