细水雾灭火系统管网吹扫要求：采用压缩空气或氮气吹扫，吹扫压力不大于管道的设计压力，吹扫气体流速不小于（ ）m/s。[单选]

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='29214' and id < 2377440 and id<>'2377440' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29214' and id > 2377440 and id<>'2377440' order by id asc limit 5