What multi-line means is that there are more winning combinations than just the one of symbols aligning on the main horizontal.
https://www.ww2.site/forum/viewtopic.php?t=101027
http://178.210.82.182/forum/delasupport/64...ed-registrering
https://bbs.digumao.cn/forum.php?mod=viewth...3841&extra=
http://forums.indexrise.com/thread-671395.html
http://forum.bandingklub.cz/viewtopic.php?f=40&t=1309668
https://s21.me/ysm21/viewtopic.php?pid=271366
http://forum.ruchkontroliwyborow.pl/index....ic=8418.new#new
https://forum.zweb-apps.xyz/viewtopic.php?t=5433
http://horsecity.ru/phpBB3/viewtopic.php?f=20&t=195212
http://forum3.bandingklub.cz/viewtopic.php...1&t=1212983
http://178.210.82.182/forum/learning/50622...automaty-barowe