double-seat stop valve双座截止阀
double-thread stop motion双纱自停装置
double-acting limit stop往复定值限位架
double-performance limit stop往复定值限位架
double-actoris limit stop往复定值限位架
double-actor limit stop往复定值限位架
start-stop double-current channel启闭式双流通路
V(动词) to play (two notes or parts) simultaneously on a violin or related instrument by drawing the bow over two strings 双按