S 系统变量
SAVEFILE
SAVEFILEPATH
SAVENAME
SAVETIME
SCREENBOXES
SCREENMODE
SCREENSIZE
SDI
SELECTIONAREA
SELECTIONAREAOPACITY
SELECTIONPREVIEW
SHADEDGE
SHADEDIF
SHADOWPLANELOCATION
SHORTCUTMENU
SHOWHIST
SHOWLAYERUSAGE
SHPNAME
SIGWARN
SKETCHINC
SKPOLY
SNAPANG
SNAPBASE
SNAPISOPAIR
SNAPMODE
SNAPSTYL
SNAPTYPE
SNAPUNIT
SOLIDCHECK
SOLIDHIST
SPLFRAME
SPLINESEGS
SPLINETYPE
SSFOUND
SSLOCATE
SSMAUTOOPEN
SSMPOLLTIME
SSMSHEETSTATUS
SSMSTATE
STANDARDSVIOLATION
STARTUP
STEPSIZE
STEPSPERSEC
SUNPROPERTIESSTATE
SUNSTATUS
SURFTAB1
SURFTAB2
SURFU
SURFTYPE
SURFV
SYSCODEPAGE
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