大家来看一下这个体该如何划分！

r1=0.3051
r2=0.2891
l=3.66
a=0.06
k=8
/prep7
et,1,solid95
et,2,combin14,,,0
r,2,k
mptemp,1,0
mp,ex,1,2e11
mp,prxy,1,0.3
cylind,r1,r2,0,l,0,360
wpoff,0.2991,0,1.6
block,-0.004,0.006,-0.05,0.05,-0.1,0.1
wpoff,-0.004,0,0
wpoff,0,0,0.1
wprot,0,0,90
cyl4,,,0,90,0.05,270,0.02
wprot,0,0,-90
wpoff,0,0,-0.2
wprot,0,0,90
cyl4,,,0,90,0.05,-90,0.02
vsel,s,,,2
vsel,a,,,3
vsel,a,,,4
CM,CM_1,VOLU
vsel,all
VSBV, 1,cm_1