constantadj.不变的;经常的n.常数;恒量
constant pump定量泵
Constantinoiu康斯坦丁诺尤
constant time时间常数
constant code等重码
Constantinianadj.君士坦丁的
constant rule定项规则
Constantinide康斯坦丁尼德
constant duty不变工况
constant area常数区,不变面积
constant drop接触电压降