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The results show that the plasticity zone and dynamically quiescent layer become fine equiaxed recrystallisation under the thermo-mechanical effect, the grains in the heat-affected zone grow up because of the effect of friction heat. When the rotation speed is 2 500 r/min and the welding time is 12 s, good joint is achieved, and the tensile shear strength of the joint reaches 9.24 kN. The tensile shear strength of spot increases with increasing tool rotation speed, with increasing welding time, the strength increases first, while then reduces. The microhardness of plasticity zone is high, but is slightly lower than that of the base metal, the minimum value of microhardness is in the heat affected zone. When the energy input of joint is high, the fracture type of spot is mode Ⅰ, and the tensile shear strength is high; on the contrary, when the energy input of joint is less the fracture type of spot is mode Ⅱ, and the strength is low.

结果表明：塑性区和动态静止层的晶粒在热和力作用下发生动态再结晶形成细小的等轴晶，热影响区的晶粒在摩擦热作用下长大变粗；搅拌头旋转速度为2 500 r/min，焊接时间为12 s时，可以获得力学性能较好的焊点，焊点的剪切强度达到9.24 kN；焊点的剪切强度随搅拌头旋转速度的增大而增大，随焊接时间的延长先增大后减小；塑性区的显微硬度较高，但略小于母材，接头显微硬度的最小值分布在热影响区；焊点热输入量较多时，接头为Ⅰ型断裂，焊点的剪切强度较高；焊点热输入量较少时，接头为Ⅱ型断裂，焊点的强度较低。

Installation Bundled with car alarm and save technician time and simplify wiring tasks compared with installation of two separated systems in one car Management Powerful graphical user interface for rapid understandings of tyre status Two-way vehicle security system to secure car Real-time monitoring of tyre pressure and temperature is also achieved to allow users to get information immediately Beep sound when start engine to remind driver TPMS is ready One remote controller can monitor both tyre pressure and secure car from burglary Reliability and Robust All sensors are locked with special tool All major components are swappable in case any component is broken Strict environmental test has approved its lifespan can last for up to 10 years Provides signal accessibility by providing peripheral signal integrity technology Receiver has fuzzy to learn IDs from original sensors and spared sensors Extremely lightweight, tiny size and special mechanical design of sensor have won TD-3000A the best TPMS system in this industry

安装 与在一部汽车上安装两个单独的系统相比，我公司产品附加了汽车报警器，节省了技术时间，简化了配线任务操纵强大的图像界面，可快速把握轮胎状况双向车安全系统，确保汽车安全胎压和温度实时监控系统，使得用户可立即获取相关信息发动机启动时会发出嘟嘟的响声，提醒驾驶员TPMS已预备就绪遥控器可监视胎压并确保汽车防盗可靠强劲所有的传感器由非凡工具锁定所有主要元件可置换，以防任何元件出现损坏严格的环境测试证实该产品的使用寿命可达10年通过外围信号完整性技术可接收信号接收器可从原始传感器和备用传感器模糊接收标识部分的信号传感器重量极轻，尺寸小巧以及非凡的机械设计使TD-3000A在业内赢得了&最好的TPMS系统&荣誉。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。