/prep7radius=20thick=10length=50cylid,radius,radius+thick,0,length,90,270wprota,,90sphere,radius,radius+thick,180,270wpoffs,,lengthsphere,radius,radius+thick,90,180/view,1,1,1,1/type,1,4/triad,off
radius=20
thick=10
length=50
cylid,radius,radius+thick,0,length,90,270
wprota,,90
sphere,radius,radius+thick,180,270
wpoffs,,length
sphere,radius,radius+thick,90,180
/view,1,1,1,1
/type,1,4
/triad,off
wpstyl,,,,,,,off
vplot
这段命令蓝色字体的是什么意思？新手提问，多多赐教！
