www.bzfxw.comICS17.120.01CCSP56DB11北京市地方标准DB11/T2310—2024大口径输水管涵流量监测规程超声传播时间法CodeforfluidflowmonitoringoflargediameterwatertransmissionculvertUltrasonictransit-timemethod2024-09-23发布2025-01-01实施北京市市场监督管理局发布www.bzfxw.comDB11/T2310—2024I目次前言..................................................................................II1范围.......................
