一句英文求助? 原帖由 laosege 于 2008-11-26 11:24 发表 as long as the instrument air supply works properly, and as long as the pneumatic lockup valve works properly, a valve with flo action will basically work the same as a valve with fo action. 这里的 ... 只要仪表风和气动锁止阀工作正常,那么故障保位开阀(flo)与故障开阀(fo)功能基本一致。查看更多