Terms containing nonreturn-to-zero level code

Subject	English	Chinese
IT	modified nonreturn to zero MNRZ level code	改进的不归零电平码
space	nonreturn-to-zero level code	非归零电平码
space	nonreturn-to-zero level code	不归零电平码
space	randomized nonreturn-to-zero level code	随机化的非归零电平码 (一种高密度数字记录码)