Solved: center line of a slot

Nickels & Crimes: 6 Cunning Ways to Trick a Slot Machine to Win · 1 Magnets · 2 Slugs · 3 Piano Wire · 4 Computer Chips · 5 The Monkey's

a narrow, elongated depression, groove, notch, slit, or aperture, esp a narrow opening for receiving or admitting something, as a coin or a letter

assa abloy slot Each booking entitles you to one trip to the site only within your specified booking slot If you turn up again within that booking slot or do not book a slot,

autoworld slot cars A thin opening or groove in something is a slot You can put letters and postcards through the mail slot at the post office