1A set of two or more switches in separate circuits but mechanically linked so that they operate simultaneously.
2A set of two or more switches in a single mounting.
Late 19th century; earliest use found in U.S. Patents.
英汉双解词典包含464360条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。