مجموعه ( رابطه تعداد زیر مجموعه و تعداد عضو )
[bigbluebutton token=3e874ce8-1918-448e-863a-1a014cccff8f]
[bigbluebutton_recordings token=3e874ce8-1918-448e-863a-1a014cccff8f]
[bigbluebutton token=3e874ce8-1918-448e-863a-1a014cccff8f]
[bigbluebutton_recordings token=3e874ce8-1918-448e-863a-1a014cccff8f]
