双向记忆效应弹簧
two-way shape memory effect spring
单、双弹簧喷油器
Single-and two-spring injectors
单双弹簧铰链
single & double action spring hinge
弹簧双端面磨床控制
controlling of spring grinding machine
对称双弹簧振子
symmetric double-spring oscillator
对称双弹簧振子系统
symmetric two-spring oscillator
黑漆双弹簧铰链
double-action black japanned spring hinge
双弹簧界面模型
double-spring interface model
双向弹性
stretch in two directions
双向双从蹄式制动器
dual two trailing shoe brake