副撑臂; 转帆索
Counterbrace \Coun"ter*brace`\, v. t. 1. (Naut.) To brace in opposite directions; as, to counterbrace the yards, i. e., to brace the head yards one way and the after yards another. 2. (Engin.) To brace in such a way that opposite strains are resisted; to apply counter braces to.