短語(yǔ)詞組短語(yǔ)absolute permissive block system 絕對(duì)容許閉鎖系統(tǒng);繙譯block system absolute 絕對(duì)閉塞制block system absolute permissive 權(quán)宜絕對(duì)閉塞制 返回 absolute block system