密闭管道 meaning in English

closed conduit

Specification for turbine meters used for the measurement of gas flow in closed conduits
密闭管道气流测量用涡轮表规范
Based on hemorheology theory , a suit of airtight pipeline system is designed , which is used to measure apparent viscosity with different shear rates
基于血流变理论,设计了一套用于测量不同切变率下表观粘度的密闭管道系统。
In the measurement , the sample flows slowly in the pipeline , and the pressure in the pipeline will change with the time , the sample ’ s apparent viscosities with different shear rates can be acquired
使血样在密闭管道中缓慢流动,通过对管道中压力(即流速)随时间变化的测量以求得不同切变率下血样的表观粘度。