The technique of free hand insertion with the lateral mass screw of atlas and vertebra dentata pedicle screw is simple, fixation is reliability and is well worth to spreading.
寰椎侧块螺钉与枢椎椎弓根螺钉徒手植入技术简单、可靠，值得推广。
2
The switch is characterized by simple structure, polarization-independence, low optic insertion loss and interchannel crosstalk, fast response speed, small in size and low drive voltage, etc.
这种磁光开关具有结构紧凑、器件体积小、偏振无关性、响应速度快、驱动电压低和串扰小等优点；
3
The utility model has the advantages of simple structure, firm insertion and large conducting current.