“up-down counter”的概念、定义、翻译、参考文献-科学参考

单词	up-down counter
释义	up-down counter 加减计数器升降计数器
随便看	center vent center washer center weight center weight governor center wheel centerx centerx central office (centrex-CO) center-zero ga(u)ge center(-)zero instrument center zero meter center zero relay centesimal centesimal balance centesimal circle graduation centesimal notation centesimal scale centesimal system centesis centibar centibar(unit of pressure) centi (C) centicell unit centigrade centigrade degree centigrade heat unit

科学参考收录了1248194条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。