up-down counter 可逆计数器 ; [计] 升降计数器
up down counter 可逆计数器
up-and-down counter 增减计数器
UDC Up C Down Counter 加减计数器
down up counter 可逆计数器
She sank down on one of the little stools behind the counter of the booth and looked up and down the long hall which, until this afternoon, had been a bare and ugly drill room.
她坐在摊位柜台后面的一条小凳子上，前前后后地观看那个长长的展览厅，这地方直到今天下午以前还是个空空荡荡难看的教练厅呢。
The horizontal line's counter is also activated by this signal to control galvanometer up and down.
此脉冲信号还是行计数器的触发信号，间接地控制振镜场扫的正程和逆程。
With the down stroke of a wing during flight, the body moves up, but the subsequent upstroke can counter that force.
用飞行翼的上下行程，身体向上移动，但随后的冲程可以对抗这种力量。
应用推荐