水力学
n dA dnz
p+dp α dz
0
P G z+dz d n
0
∑F
n
= pdA ( p + dp)dA dG cosα = 0
dpdA γdAdn cos α = 0
dn cosα = dz p z+ =C
γ
水力学
n dA dnz
p+dp α dz
0
P G z+dz d n
0
∑F
n
= pdA ( p + dp)dA dG cosα = 0
dpdA γdAdn cos α = 0
dn cosα = dz p z+ =C
γ
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