ring-and-ball method

The treatise advances a new method to judge two kinds of fixed group of benzoic ring on electrophilic substitutive reaction in benzoic ring.

对苯环上的亲电取代反应提出一种判断苯环上两类定位基的新方法。

Evaluation of Uncertainty in Pitch Diameter Measurements of Thread Plug Gauge Using Tri-needle Method The Method for Measuring Diameter Size of Ring with Universal Measuring Microscope

三针法测量螺纹塞规中径的不确定度评定用万能工具显微镜测量环规内径尺寸的方法

It is focused on a new measuring method called partial-thin-wall method for the radial pressure distribution on a piston ring as well as on the theoretical evaluation of its working principle.

着重介绍了活塞环径向压力测量的一种新方法&局部薄壁测量法，并从理论上对这种测定方法进行了分析。

Field corrosion monitoring of rebars in concrete by guard ring electrode method

基于护环技术的混凝土中钢筋腐蚀监测研究

Lateral Mass Method with Side Trapezoid Thread Ring Pitch Diameter Evaluation of Uncertainty in Measurement

侧规法测梯形螺纹环规中径测量结果的不确定度评定

The Method of Machining Spherical Surface of Outer Guide Ring for Tubular Turbine

贯流式水轮机外导水环球面的加工

Feasibility of guard ring method for corrosion evaluation in reinforced concrete

护环法在钢筋混凝土体系腐蚀评价中的可行性研究

Spot evaluation test, which was carried out by the method of corrosion test ring, results show: composite inhibitor is consistent to saturated saltwater drilling fluids, its inhibition efficiency is about 90%.

运用腐蚀试验环法进行现场评价试验，结果表明：该复合缓蚀剂和饱和盐水钻井液配伍性良好，现场缓蚀率达到90%左右，效果明显。

Ticket delivery method: Beijing official first-class round-trip tickets Cincinnati Business in Beijing within Ring Free Delivery.

送票方式: 北京往返辛辛那提商务公务头等机票在北京市五环内免费送票.

A new method was presented for auto-edge-detection of bacteriostatic ring.

提出了一种自动检测抑菌圈边缘的新方法.