ring test

Taking 17 year old Ginkgo biloba as test material, the effects of temperature and precipitation on wood ring width, ring density maximum density and minimum density were studied.

以北京地区17年生银杏为试材，研究了气温和降水对银杏木材年轮宽度、年轮密度、最大密度、最小密度的影响。

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After simulation test and study on the construction of long span stone arch bridge, it is understanded that the combined effect between arch ring and arch center formed in advance is clear and the stress of arch ring is closely related to the process of construction.

施工模拟试验表明，特大跨径石拱桥在分环分段砌筑时，先期形成的拱环与拱架的联合作用明显，拱圈应力与施工过程密切相关。

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This article introduces the working principle, structural types and characteristics and the performance inspection of the floating ring seals and analyzes several factors which may affect oil leakage rate of the floating ring seals, whose aim is for reference for design and test floating ring seals.

本文介绍了浮环密封的工作原理、结构型式和特点，以及浮环密封的性能检验，分析了影响浮环密封漏油量的几种因素，为浮环密封的设计和试验提供参考。

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This paper expatiates a suit of software and hardware design for displacement test of ring valve to piston compressor, and dissertates the principle and structure of the eddy current displacement sensor for ring valve.

介绍了一套活塞式压缩机环状阀阀片位移检测系统的软、硬件设计以及阀片位移检测用电涡流位移传感器的原理和结构。在线计算实时精度，系统不必标定，大大简化了检测过程。

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An ideal floating-head exchanger pressure test positioner, general purpose O-type ring seal pressure test positioner was introduced, and a comparison between packing seal pressure test positioner and C-type ring seal pressure test positioner was also made both in theory and application effect.

介绍了一种理想的浮头式换热器试压胎具&通用O型环密封试压胎具，并在原理上和使用效果上与填料密封试压胎具和C型环密封试压胎具进行了比较。

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The measurement of indentation diameter of samples with φ ≤ 30mm for Brinell hardness test by elliptical ring

利用椭圆环测量φ≤30mm试样的布氏硬度

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Making use of the test features of ring shear apparatus, the change law of shear strength of soils under large shear displacement can be studied.

利用环剪仪的试验特点，可以研究土体在较大剪切位移下抗剪强度的变化规律。

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In this paper, the method of pulsating hydraulic test to relief retaining ring residual stress is introduced.

本文介绍了用油压脉动试验的方法去除护环的宏观残余应力。

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A Study on Fatigue Test of the Steel Ring of Metal V-Belt

金属带带环疲劳试验研究

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Industrial Test of Large Particle Ring Vanadium Catalyst

大颗粒环状钒催化剂应用试验情况

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