关隔离阀 quick closing emergency valve: 应急快闭阀; 应急速闭阀quick closing safety valve: 快闭安全阀quick closing valve: 高速阀; 急闭阀; 快闭阀; 快速关闭阀; 速闭阀; 速关阀quick-closing emergency valve: 速闭应急阀; 应急速闭阀quick-closing stop valve: 速闭截止阀下载手机词典可随时随地查词查翻译