Revit section box 刨面
https://knowledge.autodesk.com/support/revit/learn-explore/caas/CloudHelp/cloudhelp/2019/ENU/Revit-DocumentPresent/files/GUID-C9EA51CB-3214-4BD8-AD55-3BEB1CCD15B6-htm.html
https://knowledge.autodesk.com/support/revit/learn-explore/caas/CloudHelp/cloudhelp/2019/ENU/Revit-DocumentPresent/files/GUID-C9EA51CB-3214-4BD8-AD55-3BEB1CCD15B6-htm.html