speedcopn.<俚>制止汽车超速行驶的警察speedn.速度；迅速v.加速；急行speed-grown poplar速生杨speed reduction unit减速器speed reducing motor减速电动机speed sampling pulse速率取样脉冲speed increasing box增速箱speedlimiting device限速装置speed of convergence收剑速度speed distance curve速度距离曲线speed - regulating调速speed variation unit变速装置