Constanty康斯坦蒂constantadj.不变的；经常的n.常数；恒量constant stress ratio等应力比constant voltage cell恒压电池constant yield factor静态产量因子constant linear speed恒线速度constant value conrol[计] 定值控制constant mesh gearbox常啮合齿轮变速器constant section beam等截面梁constant dollar value真实美元价值, 不变美元价值constant melting rate恒熔速constant of judgement判断常项