单项选择题
有一根Φ219×7中压燃气钢管L=200m,Pl = 150kPa,标态下输送流量2000Nm3/ h,则0℃时该管段末端压力P2()KPa ρ气=0.7kg/Nm3,运动黏度25×10-6m2/s,Δ=0.17mm
A.145.7
B.148.7
C.150.7
D.155.7
点击查看答案
单项选择题
A.145.7
B.148.7
C.150.7
D.155.7