In order to increase the walking speed of the rolling ramper , optimize the structure and remedy its shortage , the paper , on the basis of deeply r esearching t he p rincipal t heory of rolling t amper , b ring forward t wo n ew d ifferent advanced models 为提高滚压夯的行走速度、优化结构、弥补不足，本文在深入研究滚压夯的工作原理的基础上，提出了两种改进模型。
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The metal oxide varistors ( mov ) , as the core organ , made under japanese technology license . it have good response to steep front surge , excellent volt - amper characteristics and high discharge capability , which provides a very consistent protection merit at steep front surge , lightning surge and seitching surge , and enhances protective capability 它具有良好的陡波响应能力、卓越的非线性伏安特性和巨大的通流容量，在尖顶波、操作波和雷电波下均有优异的保护能力，工作性能几乎不受波形影响。
