closed conduit meaning in Chinese

暗沟涵洞
暗沟排水管
暗管,暗渠
暗管道
密闭管道

Transit - time flowmeters in full closed conduits
全闭路导管中运送时间流量计
Measurement uncertainty for fluid flow in closed conduits
密封管道中液体流量测量的不确定度
Measurement of fluid flow in closed conduits - weighing method
封闭管道中流体流量测量.称重法
Measurement of liquid flow in closed conduits - weighing method
封闭管道中液体流量的测量称重法
Measurement of liquid flow in closed conduits . weighing method
封闭管道液体流量的测量.重量法

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