方法：用硬化剂注射法建立兔椎动脉型颈椎病模型，给予电针治疗20天后观察血浆内皮素(et)和血清超氧物歧化酶(SOD)的变化。
Methods: Modeling the CSA in rabbits by injecting sclerosing agent, and then observe the changes of et and serum SOD after treatment by ea 20 days later.
目的：测定涂布超硬石膏表面硬化剂有机硅树脂前后石膏模型的表面硬度和抗磨损性能，为该石膏表面硬化剂的临床应用提供依据。
The superficial hardening of non-quenched steels had been carried out on a surface grinder, the influences of grinding mode and cooling conditions on the surface hardened layer were studied.
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