workbench中添加link单元命令流

h4wade

最近要在workbench中添加link单元，在网上看到一段例子，但是本人没学过命令流，能否帮我用中文解释下这段命令流，谢谢

/prep7
etnum=200
et,etnum,link10
keyopt,etnum,2,1
keyopt,etnum,3,1
nlgeom,on

rnum=200
r,rnum,100,0.001

matnum=200
mp,ex,matnum,2.1e5
mp,dens,matnum,7.8e-6

cmsel,s,point1
*get,Apoint,node,,num,min
nsel,none

cmsel,s,point2
*get,Bpoint,node,,num,min

type,etnum $real,rnum    $mat,matnum
e,Apoint,Bpoint

fini
/solu