发布时间:2025-02-03 00:03:24
一般小区室外的给水为dn100~dn200、排水(雨水)管为dn400、污水管为dn300、消防管为dn100、喷淋(室内)最大为dn150、煤气dn80、电缆 每根dn100~dn200、电信 一般两根dn100~dn200.单位是mm
防空地下室战时人员出入口通道按规范规定最小净宽和最小净高分别应为
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