seven speed transmission gear selector  七档变速箱档位选择器

seven speed semiautomatic transmission  七档半自动变速箱

seven speed lift control  七速提升控制

seven speed lift system  七速提升系统

Automatic speed transmission  自动变速装置

constant speed transmission  恒速驱动

continuous variable speed transmission  无段变速器

control of transmission speed  速率控制

Conversion speed speed -governing  变频调速

creep speed transmission  齿轮式传动

data transmission speed  数据传输速率

double-speed transmission  双速传输; 双速传动

effective transmission speed  有效传输速度; 有效传输速率

eight speed transmission  八速变速箱

equal-speed transmission mechanism  等速传动机构

four speed [transmission] gear  四速排挡

four-speed transmission  四档传动系

frame transmission speed  帧发送速率

Frequency conversion speed transmission  变频调速