反复冲击

Most people in the repeated impact on a hard surface activities such as running, basketball, tennis tibia or splint ...

大部分的人都在反复冲击坚硬的表面上的活动，如跑步，篮球，网球胫或夹板。。。。

Typically, guitar riffs make use of fast tremolo picking, and heavy palm muting for a percussive effect.

通常，吉他反复段落用快速碎拨和重度手掌闷音来达到冲击效果。

Friday, rubber, plastics, rubber adhesive tape test series grinding test machine, wear test machine, wear testing machine, folding machine, foam compression stress test machine, foam plastic repeated compression test machines, test material removed machine, Determination of the plastic melt index machine, impact testing machine, heating distortion temperature testing machine, falling ball impact test machine, rigid plastic drop hammer impact test machine, plastic film drop hammer impact testing machine, high temperature ashing furnace, temperature testing machine tape retention, Tape retention test machine, the beginning of sticky tape ball test machine, color device, industrial projectors, coordinate measuring instrument.

五、橡胶、塑胶、胶带试验系列橡胶胶磨试验机、磨耗试验机、耐磨试验机、耐折试验机、泡棉压缩应力试验机、发泡塑反复压缩试验机、试料磨平机、塑胶熔融指数测定机、冲击试验机、加热变形温度试验机、落球冲击试验机、硬质塑胶落锤冲击试验机、塑胶膜落锤冲击试验机、高温灰化炉、恒温胶带保持力试验机、胶带保持力试验机、胶带初粘性滚球试验机、色差仪、工业投影仪、三座标测量仪。

And because of its serious peeling and deforming, the production of mill machine-hour is affected, it is not good for using.

因为贝氏体具有硬度较高、机械性能较好的综合性能，奥氏体在反复冲击载荷下有加工硬化现象，使用中&外硬里韧&，因此，这两种基体组织的高铬球应该是最佳研磨体。

The article introduces the working mechanism and characteristics of the column hammer impact expanding pile process to reinforce the subgrade and its design calculation method.

在《建筑地基处理技术规范》(JGJ79一2002)中对柱锤冲扩桩法的解释是：&反复将柱状重锤提到高处使其自由落下冲击成孔，然后分层填料夯实形成扩大桩体，与桩间土组成复合地基的地基处理方法&。

When the speed of piton changes from several positive meters per second to negative during short time , a huge transient impacting force acts on the piston. The force spreads in the piston with stress wave. Converging force will become at some sections, which can destroy the piston.

从风动冲击器的工作原理可以得知，风动冲击器的活塞在高压气流的推动下，反复冲击钻头，冲击时活塞的速度由向下的几米每秒在极短时间内反弹为向上的速度，因而对活塞产生一个极大的瞬时冲击力，该力以应力波的形式在活塞内传播，就会在活塞的某些断面产生应力集中，造成活塞的破坏。

Dongguan Jian Qiao Equipment Co., Ltd was established for many years, located in Guangdong Province Tangxia Tangxia Town, Dongguan City Industrial Zone on the 30th the first company has been engaged in the electronic testing equipment, environmental test equipment sales services and the development of automatic test system, the main product has : testing machine, furniture testing machine, swing machine, optical quality control testing instruments, wire tester, wear-resistant machine, constant temperature and humidity machine, optical image measuring instrument, wire testing machine, office chair repeated impact test machine, a desk drawer repeated testing machine, office chair backrest repeated testing machine, office chairs rotary life testing machine, officelife test machine, plug line hoist swing test, MIT-style folding strength testing machine, tensile testing machine, micro-computers, paper tube compression testing machine, aging test machine, testing machine decolorization extent, resistant to rubbing tester, testing machine embrittlement, sudden pull test machine, testing machine, such as bonding strength.

东莞市剑乔仪器设备有限公司创建多年，位于广东省东莞市塘厦镇塘厦第一工业区30号公司一直从事电子测试仪器、环境试验设备的销售服务和自动测试系统的开发，主要产品有：试验机，家具试验机，摇摆试验机，光学品管检测仪器，线材测试仪，耐磨机，恒温恒湿机，光学影像测量仪，线材试验机，办公椅反复冲击试验机，办公桌抽屉反复试验机，办公椅反复靠背试验机，，办公椅旋转寿命试验机，办公椅脚寿命试验机，插头线吊重摆动试验，MIT式耐折强度试验机，微电脑拉力试验机，纸管抗压试验机，老化试验机，脱色程度试验机，耐揉试验机，脆化试验机，突拉试验机，胶合强度试验机等。

The main products include: 1, tensile strength, universal testing machine: microcomputer-controlled universal testing machine, economic-type universal testing machine, tensile testing machine micro-computer, electric / manual (Vertical / Horizontal / double pole / single pole) Rally Units, micro-computer plug test machine, spring tension and compression testing machine, etc.; Second, environmental testing machine series: constant temperature and humidity chamber, drying oven, large load-aging room, walk-in constant temperature and humidity test chamber , Thermal Shock Test Chamber, UV weathering tester, salt spray testing machine, aging chamber three, cartons, packaging, furniture testing machine series: microcomputer carton compression testing machine, the breakdown strength test machine, drop (single arm / arms) Test Units, Units microcomputer vibration test, vibration test Analog Motor Transport Units four, electrical equipment testing machine series: plug wire bending test machine, drum testing machine plugs, plug wire hoist swing test machine, plug-line static tensile testing machine, sudden pull test machine, power cord bending test machine, combustion testing machine, 90-degree peel strength testing machine, torsion testing machine wire, wire abrasion test machine, flexible wires and flexibility testing machine, wire print Kennedy fastness testing machine, measuring the rate of wire testing machine, fatigue test handset line stretching machine, plug test machine, torsion testing machine cold, temperature testing machine, wire thermostat ball pressure testing machine, hot wire tester, leakage from marks tester, wire short-circuit / open circuit / high pressure / low pressure / insulation / conduction / mispairing tester; Friday, computer, mobile phone tester series: Life expectancy axis testing machine, testing machine life clamshell mobile phone, key life testing machine, resistance friction test machine, fully automatic torque tester, mobile Units drop test, tape wear-resistant test machine, the mouse roller life test machine; six, rubber, plastic, tape testing machine series: wear test machine, folding / Wear-resistant test machine, winding machine, vertical / rebound test machine, the permanent distortion compression test machines, foam compression stress test machine, foam plastic repeated compression test machines, test material removed machine, plastic machine Determination of Melt Index , melting point tester, heat distortion temperature test trough, falling ball / drop down / DuPont impact test machine, to maintain constant temperature test tape machine, adhesive tape early bowls tester, hardness tester, peel strength testing machine; seven, footwear, leather , Testing Machine Series: friction test machine, add sulfur testing machine, conveyor-type Needle detector machine, friction dyeing fastness tester, testing machineDecoloration friction, standard light box, cold testing machine

主要产品包括：一、拉力强度、万能材料试验机：微机控制万能材料试验机、经济型万能材料试验机、微电脑拉力试验机、电动/手动（立式/卧式/双杆/单杆）拉力台、微电脑插拔力试验机、弹簧拉压试验机等；二、环境试验机系列：恒温恒湿试验箱、干燥箱、大型负载老化室、步入式恒温恒湿试验室、冷热冲击试验箱、UV耐候试验机、盐水喷雾试验机、老化试验箱三、纸箱、包装、家私试验机系列：微电脑纸箱抗压试验机、破裂强度试验机、跌落试验台、微电脑振动试验台、模拟汽车运输振动试验台四、电工器材试验机系列：插头引线弯折试验机、插头滚筒试验机、插头线吊重摆动试验机、插头线静态拉力试验机、突拉试验机、电源线折曲试验机、燃烧试验机、90度剥离强度试验机、电线扭转试验机、电线耐磨损试验机、可挠电线柔软度试验机、电线印刷体坚牢度试验机、线材测长率试验机、听筒线伸缩疲劳试验机、插拔力试验机、低温冷挠试验机、温升试验机、电线恒温球压试验机、灼热丝试验机、漏电起痕试验机、线材的短路/断路/高压/低压/绝缘/导通/误配测试仪；五、计算机、手机试验机系列：转轴寿命试验机、手机翻盖寿命试验机、按键寿命试验机、耐磨擦试验机、全自动扭力试验机、手机跌落试验台、纸带耐磨试验机、鼠标滚轴寿命试验机；六、橡胶、塑料、胶带试验机系列：磨耗试验机、耐折/耐磨试验机、曲折试验机、垂直/反跳弹性试验机、永久压缩歪度试验机、泡棉压缩应力试验机、发泡塑料反复压缩试验机、试料磨平机、塑料熔融指数测定机、融点测试机、热变形温度试验槽、落球/落垂/杜邦冲击试验机、恒温胶带保持力试验机、胶带初粘性滚球试验机、硬度计，剥离强度试验机；七、制鞋、皮革、试验机系列：磨擦试验机、加硫试验机、输送式检针机、磨擦染色坚牢度试验机、双锤磨擦脱色试验机、标准光源箱、耐寒试验机

A series of erosion-corrosion test has been done to J55 steel under the influence of current of gas-liquid phase by indoor self-made devices, and the corrosion mechanism of current of gas-liquid phase to oil pipe's inner surface has been got. The results show that oil pipe's inner surface will be corroded fleetly by liquid medium and corrosion products will form on it. But at the same time, the corrosion products or protective layer will be removed from the inner surface of steel pipes under the alternate impact of high speed gas and liquid flow, and on this bare steel surface corrosion film will form again and be removed again. Thus, by these ways the corrosion is exacerbated. Surface erosion-corrosion failure comes into being with the circulation of this process going on.

本文主要在气液两相流作用条件下，通过室内自制装置，对管材钢J55做了系列冲刷-腐蚀试验，结果表明，气液两相流对钢管内表面冲刷－腐蚀的机理是钢管内表面会受到液体介质的快速腐蚀，生成腐蚀产物，同时钢管金属表面不断被具有高流速的气液相交替地冲击，不断地从金属表面脱去保护膜或腐蚀产物，裸露的钢表面又会被介质快速腐蚀形成腐蚀膜后，再被两相流冲掉，如此反复，造成管内金属表面膜的连续破坏，使腐蚀加剧，最终导致钢铁表面的冲刷腐蚀失效。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。